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Revenue Recognition (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Revenue from Contract with Customer [Abstract] |  |  |  |
Stock borrow / stock loan | $ 2,240,000 | $ 771,000 | $ 4,087,000 | $ 1,215,000
Gross revenue from stock borrow/ Stock loan | 7,021,000 | 2,008,000 | 11,851,000 | 3,671,000
Expenses from stock borrow/stock loan | 4,781,000 | 1,237,000 | 7,764,000 | 2,456,000
Client expenses | 103,000 | $ 134,000 | 330,000 | $ 352,000
Other receivables | 34,000 |  | 34,000 |
Accounts payable and accrued liabilities | $ 225,000 |  | $ 225,000 |

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- Definition Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer. + References No definition available. + Details
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