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Goodwill and Intangible Assets, Net (Schedule of Information Related to Intangible Assets) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |
Purchase Price | $ 1,057,000 |  |
Amortization | 213,000 | $ 35,000 |
Total Intangible assets | $ 809,000 | 1,022,000 | [1]
Customer Relationships [Member] | Weeden Prime Services LLC [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Date acquired | Nov. 30, 2019 |  |
Original useful life | 6 years |  |
Remaining useful life | 4 years 10 months 25 days |  |
Purchase Price | $ 987,000 |  |
Amortization | 155,000 | 23,000 |
Total Intangible assets | $ 809,000 | 964,000 |
Trade Names [Member] | Weeden Prime Services LLC [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Date acquired | Nov. 30, 2019 |  |
Original useful life | 6 months |  |
Purchase Price | $ 70,000 |  |
Amortization | 58,000 | 12,000 |
Total Intangible assets |  | $ 58,000 |
[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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- Definition The amount of expense recognized in the current period that reflects the allocation of capitalized costs associated with acquisition of business. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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