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v3.20.2

Organization and Basis of Presentation (Details) - USD ($) |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 07, 2020 | Jun. 22, 2020 | Sep. 30, 2020 | Dec. 31, 2019 | Jan. 25, 2019
Business Acquisition [Line Items] |  |  |  |  |
Common stock, par value |  |  | $ 0.01 | $ 0.01 |
Deposits with and other non current receivables from multiple broker-dealers and clearing organizations |  |  | $ 2,100,000 | $ 1,900,000 |
StockCross [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Equity method investment in StockCross |  |  |  |  | 15.00%
Percentage of remaining interest in StockCross purchased | 85.00% |  |  |  |
Issuance of common stock in StockCross acquisition | 3,298,774 |  |  |  |
Cash clearing deposits |  |  |  | 75,000 |
NFS [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash clearing deposits |  |  | 50,000 | 50,000 |
Goldman Sachs [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash clearing deposits |  |  | 2,000,000 | 2,000,000 |
Pershing [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash clearing deposits |  |  | $ 1,000,000 | $ 1,000,000 |
WPS Prime Services, LLC [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchase price |  | $ 7,300,000 |  |  |

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