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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 02, 2019
Cash segregated in special reserve bank account | $ 110,000 |  |
FDIC insured amount | 250,000 |  |
Advertising costs | 2,000 | 45,000 |
Income taxes receivable | 141,000 | 79,000 |
Right-of-use assets | 2,810,000 |  |
Lease liabilities | 3,114,000 |  |
Note payable | $ 3,000,000 |  |
Promissory Note [Member] | Weeden Prime Services LLC [Member] |  |  |
Note payable |  |  | $ 3,000,000
Robo-Advisor [Member] |  |  |
Estimated useful life of software | 3 years |  |
StockCross [Member] |  |  |
Cash clearing deposits | $ 75,000 | 75,000 |
NFS [Member] |  |  |
Cash clearing deposits | 50,000 | 50,000 |
Goldman Sachs [Member] |  |  |
Cash clearing deposits | 2,000,000 | 2,000,000 |
Pershing [Member] |  |  |
Cash clearing deposits | $ 1,100,000 | $ 1,100,000 |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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