v3.26.1
Average Annual Total Returns
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S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500 TR Index (reflects no deduction for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%     10.61%                        
Performance Inception Date Jul. 11, 2007                                      
Kinetics Spin-Off And Corporate Restructuring Fund, Institutional Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Institutional Class — Return Before Taxes                                      
Average Annual Return, Percent   (19.28%) 18.93%   14.72%     7.00%                        
Performance Inception Date Jul. 11, 2007                                      
Kinetics Spin-Off And Corporate Restructuring Fund, Institutional Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Institutional Class — Return After Taxes on Distributions                                      
Average Annual Return, Percent   (21.23%) 17.48%   13.70%     6.40%                        
Performance Inception Date Jul. 11, 2007                                      
Kinetics Spin-Off And Corporate Restructuring Fund, Institutional Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Institutional Class — Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (9.98%) 15.37%   12.25%     5.76%                        
Performance Inception Date Jul. 11, 2007                                      
Kinetics Spin-Off And Corporate Restructuring Fund, Advisor Class A                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Advisor Class A Shares — Return Before Taxes                                      
Average Annual Return, Percent   (24.13%) 17.23%   13.76%         6.78%                    
Performance Inception Date May 04, 2007                                      
Kinetics Spin-Off And Corporate Restructuring Fund, Advisor Class C                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Advisor Class C Shares — Return Before Taxes                                      
Average Annual Return, Percent   (20.79%) 17.74%   13.56%       6.39%                      
Performance Inception Date May 24, 2007                                      
Kinetics Spin-Off And Corporate Restructuring Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] No Load Class Shares — Return Before Taxes                                      
Average Annual Return, Percent   (19.45%) 18.68% 15.01%                                
Performance Inception Date Dec. 11, 2017                                      
No Load Class Prospectus | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                           8.07% [1],[2] 10.05% [3]
No Load Class Prospectus | NASDAQ Composite® Total Return Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] NASDAQ Composite® Total Return Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   21.14% 13.35%   17.66%                              
No Load Class Prospectus | NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   20.36% 12.52%   16.59%                             10.57% [3]
No Load Class Prospectus | MSCI ACWI Net Total Return Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI ACWI Net Total Return Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   22.34% 11.19%   11.72%                           6.21% [2]  
No Load Class Prospectus | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Percent   22.34% 11.19%   11.72%                           6.21% [1]  
No Load Class Prospectus | S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                         8.17%    
No Load Class Prospectus | MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] [5] MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)(2)                                      
No Load Class Prospectus | S&P 600® SmallCap Index TR (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] [5] S&P 600® SmallCap Index TR (reflects no deductions for fees, expenses or taxes)(2)                                      
Average Annual Return, Percent [5]   6.02% 7.31%   9.81%                         9.16%    
No Load Class Prospectus | S&P 500® TR Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® TR Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%             10.90%                
No Load Class Prospectus | MSCI EAFE Index (reflects no deductions of fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI EAFE Net (USD) Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   31.22% 8.92%   8.18%             5.28%                
No Load Class Prospectus | Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   7.30% (0.36%)   2.01%   2.91%                          
No Load Class Prospectus | Bloomberg U.S. Corporate High Yield Bond Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Bloomberg U.S. Corporate High Yield Bond Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   8.62% 4.51%   6.53%   6.94%                          
No Load Class Prospectus | CBOE S&P 500 BuyWrite Monthly Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] CBOE S&P 500 BuyWrite Monthly Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   8.91% 9.33%   7.31%   6.07%                          
No Load Class Prospectus | CBOE S&P 500 PutWrite Index (PUT) (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] CBOE S&P 500 PutWrite Index (PUT) (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   9.19% 10.59%   7.98%   7.22%                          
No Load Class Prospectus | Kinetics Internet Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (9.04%) 12.71%   15.49%                             14.65% [3]
Performance Inception Date Oct. 21, 1996                                      
No Load Class Prospectus | Kinetics Internet Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (9.42%) 12.43%   13.84%                             13.71% [3]
No Load Class Prospectus | Kinetics Internet Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (5.08%) 10.14%   12.24%                             12.98% [3]
No Load Class Prospectus | Kinetics Global Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   2.89% 16.61%   15.64%                           3.60% [1]  
Performance Inception Date Dec. 31, 1999                                      
No Load Class Prospectus | Kinetics Global Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   2.16% 15.83%   14.98%                           3.16% [1]  
No Load Class Prospectus | Kinetics Global Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   2.04% 13.12%   12.99%                           2.73% [1]  
No Load Class Prospectus | Kinetics Paradigm Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (14.59%) 19.01%   16.74%                           11.31% [2]  
Performance Inception Date Dec. 31, 1999                                      
No Load Class Prospectus | Kinetics Paradigm Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (16.11%) 17.92%   15.86%                           10.91% [2]  
No Load Class Prospectus | Kinetics Paradigm Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (7.52%) 15.40%   14.07%                           10.07% [2]  
No Load Class Prospectus | Kinetics Small Cap Opportunities Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (8.66%) 21.10%   18.22%                         12.22%    
Performance Inception Date Mar. 20, 2000                                      
No Load Class Prospectus | Kinetics Small Cap Opportunities Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (8.70%) 20.41%   17.88%                         11.97%    
No Load Class Prospectus | Kinetics Small Cap Opportunities Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (5.10%) 17.17%   15.63%                         10.97%    
No Load Class Prospectus | Kinetics Market Opportunities Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (3.09%) 19.47%   18.90%             11.92%                
Performance Inception Date Jan. 31, 2006                                      
No Load Class Prospectus | Kinetics Market Opportunities Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (3.24%) 19.15%   18.35%             11.58%                
No Load Class Prospectus | Kinetics Market Opportunities Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (1.72%) 15.82%   15.99%             10.35%                
No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   5.13% 3.19%   3.72%   3.92%                          
Performance Inception Date Feb. 11, 2008                                      
No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   2.93% 1.48%   2.02%   2.34%                          
No Load Class Prospectus | Kinetics Multi-Disciplinary Income Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] [6] Return After Taxes on Distributions and Sale of Fund Shares(1)                                      
Average Annual Return, Percent [6]   3.01% 1.69%   2.11%   2.37%                          
Institutional Class Prospectus | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                           8.07% [7] 10.05% [8]
Institutional Class Prospectus | NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] NASDAQ Composite® Index (reflects no deduction for fees, expenses or taxes)                                      
Average Annual Return, Percent   20.36% 12.52%   16.59%                             10.57% [8]
Institutional Class Prospectus | MSCI ACWI Net Total Return Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI ACWI Net Total Return Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   22.34% 11.19%   11.72%                 8.52%            
Institutional Class Prospectus | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   22.34% 11.19%   11.72%                           6.21% [7]  
Institutional Class Prospectus | S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82% 11.44%             10.90% 10.94%            
Institutional Class Prospectus | MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] [9] MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)(1)                                      
Institutional Class Prospectus | MSCI EAFE Index (reflects no deductions of fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   31.22% 8.92%   8.18% 4.35%                            
Institutional Class Prospectus | S&P 600® SmallCap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] [9] S&P 600® SmallCap Index (reflects no deductions for fees, expenses or taxes)(1)                                      
Average Annual Return, Percent [9]   6.02% 7.31%   9.81%               8.82%              
Institutional Class Prospectus | Kinetics Internet Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (9.04%) 12.71%   15.49%                             14.65% [8]
Performance Inception Date Oct. 21, 1996                                      
Institutional Class Prospectus | Kinetics Internet Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (9.42%) 12.43%   13.84%                             13.71% [8]
Institutional Class Prospectus | Kinetics Internet Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (5.08%) 10.14%   12.24%                             12.98% [8]
Institutional Class Prospectus | Kinetics Global Fund, No Load Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   2.89% 16.61%   15.64%                           3.60% [7]  
Performance Inception Date Dec. 31, 1999                                      
Institutional Class Prospectus | Kinetics Global Fund, No Load Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   2.16% 15.83%   14.98%                           3.16% [7]  
Institutional Class Prospectus | Kinetics Global Fund, No Load Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   2.04% 13.12%   12.99%                           2.73% [7]  
Institutional Class Prospectus | Kinetics Paradigm Fund, Institutional Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (14.41%) 19.25%   16.98%                 11.26%            
Performance Inception Date May 27, 2005                                      
Institutional Class Prospectus | Kinetics Paradigm Fund, Institutional Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (15.91%) 18.15%   16.08%                 10.78%            
Institutional Class Prospectus | Kinetics Paradigm Fund, Institutional Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (7.43%) 15.60%   14.28%                 9.80%            
Institutional Class Prospectus | Kinetics Small Cap Opportunities Fund, Institutional Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (8.47%) 21.34%   18.45%               11.65%              
Performance Inception Date Aug. 12, 2005                                      
Institutional Class Prospectus | Kinetics Small Cap Opportunities Fund, Institutional Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (8.56%) 20.61%   18.09%               11.40%              
Institutional Class Prospectus | Kinetics Small Cap Opportunities Fund, Institutional Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (4.95%) 17.37%   15.83%               10.24%              
Institutional Class Prospectus | Kinetics Market Opportunities Fund, Institutional Class                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (2.89%) 19.71%   19.15% 11.78%                            
Performance Inception Date May 19, 2008                                      
Institutional Class Prospectus | Kinetics Market Opportunities Fund, Institutional Class | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (3.09%) 19.34%   18.56% 11.37%                            
Institutional Class Prospectus | Kinetics Market Opportunities Fund, Institutional Class | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (1.57%) 16.00%   16.20% 10.07%                            
Advisor A & C Prospectus | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P® 500 Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82% 11.44%                            
Advisor A & C Prospectus | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   22.34% 11.19%   11.72% 7.52%                            
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class A                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (14.49%) 11.11%   14.53%                       9.85% [10]      
Performance Inception Date Apr. 26, 2001                                      
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class A | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (14.88%) 10.81%   12.79%                       8.76% [10]      
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class A | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (8.29%) 8.81%   11.33%                       8.08% [10]      
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class A | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                       9.22% [10]      
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class A | NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   20.36% 12.52%   16.59%                       10.37% [10]      
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class C                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (10.60%) 11.87%   14.64%           11.54% [10]                  
Performance Inception Date Feb. 16, 2007                                      
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class C | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%           10.66% [10]                  
Advisor A & C Prospectus | Kinetics Internet Fund, Advisor Class C | NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] NASDAQ Composite® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   20.36% 12.52%   16.59%           12.55% [10]                  
Advisor A & C Prospectus | Kinetics Global Fund, Advisor Class C                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   1.06% 15.75%   14.78% 8.26%                            
Performance Inception Date May 19, 2008                                      
Advisor A & C Prospectus | Kinetics Global Fund, Advisor Class A                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (3.34%) 14.98%   14.77% 8.55%                            
Performance Inception Date May 19, 2008                                      
Advisor A & C Prospectus | Kinetics Global Fund, Advisor Class A | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (3.98%) 14.29%   14.16% 8.19%                            
Advisor A & C Prospectus | Kinetics Global Fund, Advisor Class A | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (1.68%) 11.79%   12.22% 7.14%                            
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class A                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (19.70%) 17.32%   15.76%                       11.20% [11]      
Performance Inception Date Apr. 26, 2001                                      
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class A | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (21.21%) 16.19%   14.85%                       10.78% [11]      
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class A | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (10.55%) 13.95%   13.17%                       9.92% [11]      
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class A | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                       9.22% [11]      
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class A | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   22.34% 11.19%   11.72%                       7.53% [11]      
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class C                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (15.99%) 18.12%   15.87%                   11.41%          
Performance Inception Date Jun. 28, 2002                                      
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class C | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                   10.66%          
Advisor A & C Prospectus | Kinetics Paradigm Fund, Advisor Class C | MSCI ACWI Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI ACWI Net Total Return Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   22.34% 11.19%   11.72%                   8.80%          
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class A                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (14.13%) 19.38%   17.22%                     10.90%        
Performance Inception Date Dec. 31, 2001                                      
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class A | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (14.13%) 18.73%   16.90%                     10.65%        
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class A | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (8.36%) 15.70%   14.71%                     9.63%        
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class A | S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%                     9.79%        
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class A | MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)                                      
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class A | S&P 600® SmallCap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 600® SmallCap Index TR (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   6.02% 7.31%   9.81%                     9.39%        
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class C                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (10.25%) 20.20%   17.33%           9.52% [12]                  
Performance Inception Date Feb. 16, 2007                                      
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class C | S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index TR (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%           9.79% [12]                  
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class C | MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI USA Small Cap Index (reflects no deductions for fees, expenses or taxes)(2)                                      
Advisor A & C Prospectus | Kinetics Small Cap Opportunities Fund, Advisor Class C | S&P 600® SmallCap Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] [5] S&P 600® SmallCap Index TR (reflects no deductions for fees, expenses or taxes)(2)                                      
Average Annual Return, Percent [5]   6.02% 7.31%   9.81%           8.40% [12]                  
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class A                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (8.88%) 17.77%   17.90%             11.31% [13]                
Performance Inception Date Jan. 31, 2006                                      
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class A | After Taxes on Distributions                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                      
Average Annual Return, Percent   (9.01%) 17.51%   17.40%             11.01% [13]                
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class A | After Taxes on Distributions and Sales                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares                                      
Average Annual Return, Percent   (5.16%) 14.38%   15.08%             9.80% [13]                
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class A | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%             10.90% [13]                
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class A | MSCI EAFE Index (reflects no deductions of fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   31.22% 8.92%   8.18%             5.28% [13]                
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class C                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] Return Before Taxes                                      
Average Annual Return, Percent   (4.76%) 18.57%   18.01%           10.23% [13]                  
Performance Inception Date Feb. 16, 2007                                      
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class C | S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] S&P 500® Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   17.88% 14.42%   14.82%           10.66% [13]                  
Advisor A & C Prospectus | Kinetics Market Opportunities Fund, Advisor Class C | MSCI EAFE Index (reflects no deductions of fees, expenses or taxes)                                        
Prospectus [Line Items]                                        
Average Annual Return, Label [Optional Text] MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)                                      
Average Annual Return, Percent   31.22% 8.92%   8.18%           4.38% [13]                  
[1] The Global Fund’s No Load Class shares commenced operations on December 31, 1999 and converted into a feeder fund of the Global Portfolio on April 28, 2000. The returns for the indices in this column have been calculated since the December 31, 1999 inception date of the Global Fund’s No Load Class shares.
[2] The Paradigm Fund’s No Load Class shares commenced operations on December 31, 1999 and converted into a feeder fund of the Paradigm Portfolio on April 28, 2000. The returns for the two indices in this column have been calculated since the December 31, 1999 inception date of the Paradigm Fund’s No Load Class shares.
[3] The Internet Fund’s No Load Class shares commenced operations on October 21, 1996 and converted into a feeder fund of the Internet Portfolio on April 28, 2000. The returns for the two indices in this column have been calculated since the October 21, 1996 inception date of the Internet Fund’s No Load Class shares.
[4] The Small Cap Fund’s No Load Class shares commenced operations on March 20, 2000, and converted to a feeder fund of the Small Cap Portfolio on April 28, 2000. The returns for the two indices in this column have been calculated since the March 20, 2000 inception date of the Small Cap Fund’s No Load Class shares.
[5] Effective April 30, 2026, the secondary broad-based index used for comparison with the Small Cap Opportunities Fund’s performance changed from the S&P 600 SmallCap Index TR to the MSCI USA Small Cap Index, which more closely reflects the types of securities in which the Fund invests.
[6] In some cases, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Return After Taxes on Distributions or Return Before Taxes due to an assumed benefit from any losses on a sale of Fund shares at the end of the measurement period.
[7] The Global Fund’s No Load Class shares commenced operations on December 31, 1999 and converted into a feeder fund of
the Global Portfolio on April 28, 2000. The returns for the indices in this column have been calculated since the December
31, 1999 inception date of the Global Fund’s No Load Class shares.
[8] The Internet Fund’s No Load Class shares commenced operations on October 21, 1996 and converted into a feeder fund of
the Internet Portfolio on April 28, 2000. The returns for the two indices in this column have been calculated since the
October 21, 1996 inception date of the Internet Fund’s No Load Class shares.
[9] Effective April 30, 2026, the secondary broad-based index used for comparison with the Small Cap Opportunities Fund’s
performance changed from the S&P 600 SmallCap Index TR to the MSCI USA Small Cap Index, which more closely
reflects the types of securities in which the Fund invests.
[10] The Internet Fund’s Advisor Class A shares commenced operations on April 26, 2001 and Advisor Class C shares commenced operations on February 16, 2007. The returns for the two indices in this column have been calculated since the inception date of the Internet Fund’s Advisor Class A shares and Advisor Class C shares, as applicable.
[11] The Paradigm Fund’s Advisor Class A shares commenced operations on April 26, 2001 and Advisor Class C shares commenced operations on June 28, 2002. The returns for the two indices in this column have been calculated since the inception date of the Paradigm Fund’s Advisor Class A shares and Advisor Class C shares, as applicable.
[12] The Small Cap Opportunities Fund’s Advisor Class A shares commenced operations on December 31, 2001 and Advisor Class C shares commenced operations on February 16, 2007. The returns for the two indices in this column have been calculated since the inception date of Advisor Class A shares and Advisor Class C shares, as applicable.
[13] The Market Opportunities Fund’s Advisor Class A shares commenced operations on January 31, 2006 and Advisor Class C shares commenced operations on February 16, 2007. The returns for the two indices in this column have been calculated since the inception date of Advisor Class A shares and Advisor Class C shares, as applicable.