CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities
Net income	$ 2,056,000	$ 3,574,000
Adjustments to reconcile net income to net cash provided by / (used in) operating activities:
Deferred income tax expense	148,000	672,000
Depreciation and amortization	1,193,000	689,000
Changes in
Receivables from customers	(5,511,000)	(15,339,000)
Receivables from non-customers		(103,000)
Receivables from and deposits with broker-dealers and clearing organizations	69,000	(14,000)
Securities borrowed	(90,228,000)	43,382,000
Securities owned, at fair value	(462,000)	1,671,000
Prepaid expenses and other assets	(586,000)	167,000
Prepaid service contract - non-current	(763,000)
Payables to customers	34,065,000	(3,541,000)
Payables to non-customers	1,283,000	(3,847,000)
Drafts payable	(1,199,000)	234,000
Payables to broker-dealers and clearing organizations	(167,000)	1,004,000
Accounts payable and accrued liabilities	311,000	(143,000)
Securities loaned	96,334,000	(35,905,000)
Securities sold, not yet purchased, at fair value	(91,000)	(4,000)
Interest payable	(10,000)
Lease liabilities	(90,000)	334,000
Taxes payable		14,000
Other liabilities		91,000
Net cash provided by / (used in) operating activities	36,352,000	(7,064,000)
Cash Flows From Investing Activities
Escrow deposit		(2,000,000)
Purchase of furniture, equipment, and leasehold improvements		(783,000)
Purchase of software	(334,000)	(1,086,000)
Net cash used in investing activities	(334,000)	(3,869,000)
Cash Flows From Financing Activities
Notes payable - related party	(2,000,000)	2,000,000
Long-term debt	4,904,000
Purchase of StockCross common stock		(3,425,000)
Return of capital distribution - StockCross		(1,600,000)
Treasury stock sales - StockCross		172,000
Net cash provided by / (used in) financing activities	2,904,000	(2,853,000)
Net increase / (decrease) in cash and cash equivalents, and cash and securities segregated for regulatory purposes	38,922,000	(13,786,000)
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - beginning of year	229,594,000	214,038,000
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - end of period	268,516,000	200,252,000
Cash and cash equivalents - end of period	4,536,000	5,883,000
Cash and securities segregated for regulatory purposes - end of period	263,980,000	194,369,000
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - end of period	268,516,000	200,252,000
Supplemental cash flow information
Cash paid during the period for income taxes	133,000	635,000
Cash paid during the period for interest	263,000	84,000
Non-cash investing and financing activities
Shares issued for payment of professional services	$ 1,127,000