Document And Entity Information [Abstract] Document Information [Table] Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Document Information [Line Items] Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Trading Symbol Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Common Stock, Shares Outstanding Entity Public Float Statement of Financial Position [Abstract] Statement [Table] Scenario [Axis] Scenario Unspecified [Domain] Scenario, Unspecified [Domain] Scenario Actual [Member] Scenario, Actual [Member] Legal Entity [Axis] Entity [Domain] Entity [Domain] Consolidated Funds [Member] Consolidated Funds [Member] Consolidated Funds [Member] Consolidated Subsidiaries [Member] Consolidated Subsidiaries [Member] Consolidated Subsidiaries [Member] Medley Limited Liability Corporation [Member]. Medley Limited Liability Corporation [Member] Medley LLC [Member] Statement [Line Items] Assets [Abstract] Assets Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and cash equivalents Cash and cash equivalents Equity method investment, at fair value Equity Method Investments, Fair Value Disclosure Investments, at fair value Investments, at fair value Represents the amount of investments in consolidated funds as of balance sheet date. Investments In Consolidated Funds Investments of Consolidated Funds, at fair value Investments, at fair value Carrying amount as of the balance sheet date of management fees earned but not received. Management Fees Receivable Management fees receivable Represents the amount as of the balance sheet date of performance fees receivable by the entity based on the investment results achieved. Performance Fees Receivable Performance fees receivable Performance fees receivable Carrying amount as of the balance sheet date of interest and dividends earned but not received. Interest And Dividends Receivable Interest and dividends receivable Interest and dividends receivable Other Assets Total other assets Other assets Assets Total assets Total assets Liabilities and Equity [Abstract] Liabilities and equity Liabilities and Equity Long-term Debt Loans payable Accounts Payable and Other Accrued Liabilities Total accounts payable and accrued expenses Accounts payable, accrued expenses and other liabilities Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount Secured borrowings Secured borrowings at fair value Secured borrowings of Consolidated Funds, at fair value Amount of payable, as of the balance sheet date, related to performance fees. Performance Fee Compensation Payable Performance fee compensation payable Performance fee compensation payable Liabilities Total accounts payable, accrued expenses and other liabilities Total liabilities Total liabilities Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Equity Stockholders' Equity Common Stock, Value, Issued Common stock value Additional Paid in Capital Capital deficit Additional paid-in-capital Retained Earnings (Accumulated Deficit) Retained earnings Retained earnings Stockholders' Equity Attributable to Parent Total stockholders' equity (deficit), Medley Management Inc. Total stockholders' equity, Medley Management Inc. Stockholders' Equity Attributable to Noncontrolling Interest Non-controlling interests Non-controlling interests Partners' Capital Medley LLC members' capital prior to reorganization Members' equity of consolidated funds Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total equity Total (deficit) equity Liabilities and Equity Total liabilities and equity Total liabilities and equity Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share (in dollars per share) Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Outstanding Income Statement [Abstract] Revenues [Abstract] Revenues Revenues: Management Fees Revenue Management fees Management fees Performance Fees Performance fees Performance fees Fees and Commissions, Other Other revenues and fees Revenues Total revenues Total revenues Operating Expenses [Abstract] Expenses Expenses: Labor and Related Expense Compensation and benefits Compensation and benefits Includes compensation to our professionals directly related to performance fees. Performance Fee Compensation Performance fee compensation Performance fee compensation Noninterest Expense Investment Advisory Fees Consolidated Funds expenses Consolidated Funds expenses General and Administrative Expense General, administrative and other expenses General, administrative and other expenses Operating Expenses Expenses Total expenses Total operating expenses Other Income and Expenses [Abstract] Other income (expense) Other income (expense): Investment Income, Dividend Dividend income Dividend income Interest Expense Interest Expense Interest expense Other Operating Income (Expense), Net Other expense, net Other expenses, net Interest, dividend and other income generated from nonoperating securities of the consolidated funds, net of other expenses. Interest and Other Income of Consolidated Funds Interest and other income of Consolidated Funds Interest and other income of Consolidated Funds Interest Expense, Other Interest expense of Consolidated Funds Interest expense from secured borrowings Net realized loss on investments of Consolidated Funds Gain (Loss) on Sale of Investments Net realized (gain) loss on investments Net realized gain (loss) on investments of Consolidated Funds Net change in unrealized depreciation on investments of Consolidated Funds Unrealized Gain (Loss) on Investments Net change in unrealized depreciation on investments of Consolidated Funds Net change in unrealized depreciation (appreciation) on secured borrowings Net change in unrealized depreciation (appreciation) on secured borrowings Net change in unrealized (depreciation) appreciation on secured borrowings of Consolidated Funds Net change in unrealized appreciation (depreciation) on secured borrowings of Consolidated Funds Represents the amount of other operating income (expense), net during the reporting period. Total Other Operating Income Expense Net Total other expense, net Total other income, net Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income Tax Expense (Benefit) Provision for income taxes Provision for income taxes Provision for (benefit from) income taxes Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income (loss) attributable to noncontrolling interest Net income attributable to non-controlling interests Net Income (Loss) Attributable to Parent Net income attributable to Medley Management Inc. Net income attributable to Medley Management Inc. Common Stock, Dividends, Per Share, Declared Dividends declared per Class A common stock Earnings Per Class A Share [Abstract] Net income per share attributable to stockholders of Class A common stock of Medley Management Inc: Earnings Per Share, Basic Earnings Per Share, Basic (in dollars per share) Earnings Per Share, Diluted Earnings Per Share, Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted Average Number of Shares Outstanding, Basic and Diluted (in shares) Weighted average shares of Class A shares outstanding Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Member Units [Member] Members' Equity [Member] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] MOF One [Member] Mof One [Member] MOF I [Member] MOF Two [Member] Mof Two [Member] MOF II [Member] Shares, Outstanding Balance (in shares) Balance (in shares) Noncontrolling Interest, Decrease from Deconsolidation Deconsolidation of fund Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation Dividends, Common Stock, Cash Dividends declared on common stock Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Excess tax benefit from dividends to RSU holders Stock Issued During Period, Value, Restricted Stock Award, Gross Issuance of Class A common stock related to vesting of restricted stock units Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of Class A common stock related to vesting of restricted stock units (shares) Stock Issued During Period, Value, New Issues Issuance of shares in Initial Public Offering, net of underwriters discount Stock Issued During Period, Shares, New Issues Issuance of shares in Initial Public Offering (in shares) Number of new stock issued during the period. Stock Issued During Period, Shares, New Issues One Issuance of Class B shares (in shares) Stock Repurchased During Period, Value Repurchase of common stock Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Initial Public Offering costs Represents the amount of allocation of contributions in excess of the carrying value of the net assets (dilution). Allocation Of Contributions In Excess Of Carrying Value Of Net Assets Dilution Dilution assumed with initial Publc Offering Partners' Capital Account, Contributions Contributions Partners' Capital Account, Distributions Distributions Partners capital account, distributions Transfer of partners' equity prior to initial public offering. Effect Of Reorganization and Offering It represents the amount of stockholders' equity, including portion attributable to noncontrolling interest prior reorganization and offering. Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Prior Reorganization and Offering Balance Dividends payable, amount per share Dividends declared, amount per share Statement of Cash Flows [Abstract] Standalone [Member] Standalone [Member] Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash used in operating activities: The net change in unrealized appreciation on investments during the reporting period. Net Change In Unrealized AppreciationOrDepreciation On Investments Net change in unrealized depreciation (appreciation) on investments Income (Loss) from Equity Method Investments Income from equity method investments Share-based Compensation Non-cash stock-based compensation Stock-based compensation Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Amortization of Financing Costs Amortization of deferred financing costs Deferred Income Tax Expense (Benefit) Total deferred provision Benefit from deferred taxes Accretion Expense Accretion of original issue discount Paid-in-Kind Interest Interest income paid-in-kind Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: The increase (decrease) during the reporting period in receivables arising from management fees. (Increase) Decrease in Management Fees Receivable Management fees receivable The increase (decrease) during the reporting period in receivables arising from performance fees. Increase (Decrease) in Performace Fees Receivable Performance fees receivable Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable, accrued expenses and other liabilities The increase (decrease) during the reporting period in performance fee compensation liability. Increase Decrease Inperformance Fees Compensationliability Performance fee compensation payable Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Increase Decrease In Cash And Cash Equivalent Cash and cash equivalents Payments to Acquire Investments Cost of investments purchased Proceeds from Sale, Maturity and Collection of Investments Proceeds from sales and repayments of investments Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Proceeds From Distributions, Equity Method Investments Proceeds From Distributions, Equity Method Investments Distributions from equity method investments Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities Proceeds from issuance of long-term debt Proceeds from issuance of debt obligations Repayments of long-term debt Repayment of loans payable Proceeds from Issuance Initial Public Offering Proceeds from Initial Public Offering Payments of Stock Issuance Costs Initial Public Offering costs Payments of Capital Distribution Distributions to members Payments of Dividends Dividends paid Contributions to Equity Method Investments Contributions to Equity Method Investments Contributions to equity method investments Payments for Repurchase of Common Stock Repurchase of class A common stock Proceeds from Noncontrolling Interests Contribution from non-controlling interest in consolidated subsidiaries Payments of Debt Issuance Costs Debt issuance costs Payments to Noncontrolling Interests Distributions to non-controlling interest holders Cash Flows Between Transferor and Transferee, Proceeds from New Transfers Proceeds from secured borrowings of Consolidated Funds Cash Flows Between Transferee And Transferor Repayments of Transfers Cash Flows Between Transferee And Transferor Repayments of Transfers Repayments on secured borrowings of Consolidated Funds Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by (used in) financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental cash flow information Interest Paid Income Taxes Paid, Net Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of non-cash financing activities Non-cash distribution to members Non-cash Distribution to Members Non-cash distribution to members Noncash or Part Noncash Acquisition, Debt Assumed Non-cash debt Dividends Payable Dividends declared but not paid Dividends payable Dividends Declared But Not Paid Dividends Declared But Not Paid Dividends declared but not paid Transfer Of Membership Interest To Non Controlling Interests In Consolidated Subsidiaries. Transfer Of Membership Interest To Non Controlling Interests In Consolidated Subsidiaries Transfer of membership interests to non-controlling interests in consolidated subsidiaries Transfer from Investments Investment in entity attributed to deconsolidation Organization and Basis of Presentation [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization and Basis of Presentation Summary of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Investments [Abstract] Investment Holdings, Schedule of Investments [Text Block] Investments Fair Value Measurements [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements Other Asset [Abstract] Other Assets Disclosure [Text Block] Other Assets Loans Payable [Abstract] Debt Disclosure [Text Block] Loans Payable Accounts Payable, Accrued Expenses and Other Liabilities [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accounts Payable, Accrued Expenses and Other Liabilities Secured Borrowings [Abstract] Transfers and Servicing of Financial Assets [Text Block] Secured Borrowings Commitments and Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Earnings Per Share [Text Block] Earnings Per Class A Share Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Compensation Expense [Abstract]