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Disclosure - PROPERTY AND EQUIPMENT - Summary of major classifications of property and equipment (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - ACQUISITION OF WILSON-DAVIS - Allocation of the purchase price (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - LEASES - Schedule of future minimum payments required by the lease agreements (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - LEASES - Schedule of future minimum payments required by the lease agreements (Details) Calc 2 link:presentationLink link:calculationLink link:definitionLink 41601 - Disclosure - INCOME TAX - Benefit (provision) for income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - INCOME TAX - Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 41603 - Disclosure - INCOME TAX - Deferred tax assets and liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) link:presentationLink link:calculationLink link:definitionLink 00305 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 40102 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS - Transition Period Comparative Data - Consolidated Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 40105 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS - Transition Period Comparative Data - Statements of consolidated cash flow (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of dilutive instruments (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - CASH SEGREGATED IN ACCORDANCE WITH FEDERAL REGULATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - RELATED PARTY TRANSACTIONS - Related Party Share Issuance/Transfers (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - RELATED PARTY TRANSACTIONS - Advances from Related Parties (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - RELATED PARTY TRANSACTIONS - Founder Shares (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - RELATED PARTY TRANSACTIONS - Related Party Loans (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Registration Rights (Details) link:presentationLink link:calculationLink link:definitionLink 40902 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Earnout liability (Details) link:presentationLink link:calculationLink link:definitionLink 40903 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Business Combination Marketing Agreement and Chardan Note (Details) link:presentationLink link:calculationLink link:definitionLink 40904 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Commercial Bancorp (Details) link:presentationLink link:calculationLink link:definitionLink 40905 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Expense Settlements (Details) link:presentationLink link:calculationLink link:definitionLink 40906 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Secured Convertible Note Financing and Funicular Amendment (Details) link:presentationLink link:calculationLink link:definitionLink 40907 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Sellers Note (Details) link:presentationLink link:calculationLink link:definitionLink 40908 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Contingent Guarantee (Details) link:presentationLink link:calculationLink link:definitionLink 40909 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Line of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 40910 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Tau Agreement - ELOC and Second ELOC Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 40911 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Subordinated Loan Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 40912 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Hanire Purchase Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 40913 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Wilson-Davis (Details) link:presentationLink link:calculationLink link:definitionLink 40914 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES - Software Development and License agreement (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - ACQUISITION OF WILSON-DAVIS - Identified excess of the purchase price over the fair value of the net assets acquired recorded as goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - ACQUISITION OF THE ASSETS OF ATLASCLEAR, INC - Purchase price allocation (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - ACQUISITION OF THE ASSETS OF ATLASCLEAR, INC - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - INTANGIBLE ASSETS - Pacsquare Purchase Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - INTANGIBLE ASSETS - Schedule of Intangible assets (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - STOCKHOLDERS EQUITY (DEFICIT) (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - WARRANTS (Details) link:presentationLink link:calculationLink link:definitionLink 41604 - Disclosure - INCOME TAX - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41701 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Company's assets and liabilities that are measured at fair value on a recurring basis (Details) link:presentationLink link:calculationLink link:definitionLink 41702 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of key inputs into the Monte Carlo model for the Subscription Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 41704 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Key Inputs into the Black-Scholes model for the Private Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 41705 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of key inputs into the Monte Carlo model for the Earnout liability (Details) link:presentationLink link:calculationLink link:definitionLink 41706 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of key inputs into the Black-Scholes model for the Conversion derivative (Details) link:presentationLink link:calculationLink link:definitionLink 41707 - Disclosure - FAIR VALUE MEASUREMENTS - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 41708 - Disclosure - FAIR VALUE MEASUREMENTS - Tau Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 41709 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of changes in the fair value (Details) link:presentationLink link:calculationLink link:definitionLink 41802 - Disclosure - SEGMENT REPORTING - Revenue and operating income (loss) (Details) link:presentationLink link:calculationLink link:definitionLink 41901 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink 41902 - Disclosure - SUBSEQUENT EVENTS - Issuances of Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - CASH SEGREGATED IN ACCORDANCE WITH FEDERAL REGULATIONS link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - NET CAPITAL REQUIREMENTS link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - CASH AND RESTRICTED CASH link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - RECEIVABLES & PAYABLES WITH BROKER DEALERS AND CLEARING ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - PROPERTY AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - NOTES PAYABLE AND COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - ACQUISITION OF WILSON-DAVIS link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - ACQUISITION OF THE ASSETS OF ATLASCLEAR, INC link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - STOCKHOLDERS EQUITY (DEFICIT) link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - WARRANTS link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - INCOME TAX link:presentationLink link:calculationLink link:definitionLink 11701 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 11801 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 11901 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS- Transition Period Comparative Data (Tables) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - CASH AND RESTRICTED CASH (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - RECEIVABLES & PAYABLES WITH BROKER DEALERS AND CLEARING ORGANIZATION (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - PROPERTY AND EQUIPMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - ACQUISITION OF WILSON-DAVIS (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - ACQUISITION OF THE ASSETS OF ATLASCLEAR, INC (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 31603 - Disclosure - INCOME TAX (Tables) link:presentationLink link:calculationLink link:definitionLink 31703 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 31803 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 40103 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS -Transition Period Comparative Data - Consolidated Balance Sheets Parentheticals (Details) link:presentationLink link:calculationLink link:definitionLink 40104 - Disclosure - DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS - Transition Period Comparative Data - Statements of consolidated Net Income (loss) (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - NET CAPITAL REQUIREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - RECEIVABLES & PAYABLES WITH BROKER DEALERS AND CLEARING ORGANIZATION - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - PROPERTY AND EQUIPMENT (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - ACQUISITION OF WILSON-DAVIS - Pro forma financial information (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - ACQUISITION OF WILSON-DAVIS - Pro forma adjustments (Details) link:presentationLink link:calculationLink link:definitionLink 41203 - Disclosure - INTANGIBLE ASSETS - Amortization of intangible assets (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - LEASES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - LEASES - Schedule of future minimum payments required by the lease agreements (Details) link:presentationLink link:calculationLink link:definitionLink 41303 - Disclosure - LEASES - Schedule of other information related to the company's operating leases (Details) link:presentationLink link:calculationLink link:definitionLink 41304 - Disclosure - LEASES - Schedule of weighted-average remaining lease term and weighted-average discount rates related to the company's operating leases (Details) link:presentationLink link:calculationLink link:definitionLink 41703 - Disclosure - FAIR VALUE MEASUREMENTS - Contingent Guarantee (Details) link:presentationLink link:calculationLink link:definitionLink 41710 - Disclosure - FAIR VALUE MEASUREMENTS - Fair value Assets and Liabilities Transfer Amount (Details) link:presentationLink link:calculationLink link:definitionLink 41801 - Disclosure - SEGMENT REPORTING (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink