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Prepaid Service Contract (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 21, 2020 | Apr. 21, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | [1]
Capitalized Contract Cost [Line Items] |  |  |  |
Prepaid asset - non-current |  |  | $ 1,004,000 |
InvestCloud, Inc [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Expense related to share-based payments |  |  | 219,000 |
Professional services and total cost |  |  | $ 764,000 |
InvestCloud, Inc [Member] | Restricted Stock [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Restricted common stock issued to InvestCloud |  | 193,906 |  |
Per share price | $ 5.81 | $ 5.81 |  |
License Fee [Member] | InvestCloud, Inc [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Initial term of license |  | 3 years |  |
Annual license fee |  | $ 600,000 |  |
Amortization period of prepaid licensing fees | 3 months |  |  |
Upfront Professional Service Fee [Member] | InvestCloud, Inc [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Consideration paid |  | 1,000,000 |  |
Professional Services [Member] | InvestCloud, Inc [Member] |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |
Value of restricted common stock issued to InvestCloud | $ 1,100,000 |  |  |
Prepaid asset - non-current | $ 2,100,000 | $ 2,100,000 |  |
Amortization period of professional services prepaid assets | 3 years |  |  |
[1] | Statement of financial condition as of December 31, 2019 represents the pro forma combination of Siebert and StockCross balances. See "Note 3 - Acquisitions" for additional detail.

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