CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 976,000	$ 1,224,000
Adjustments to reconcile net income to net cash provided by / (used in) operating activities:
Deferred income tax expense	291,000	90,000
Depreciation and amortization	448,000	194,000
Changes in
Receivables from customers	15,884,000	(5,063,000)
Receivables from non-customers		(146,000)
Receivables from and deposits with broker-dealers and clearing organizations	(109,000)	199,000
Securities borrowed	131,306,000	(65,259,000)
Securities owned, at fair value	(662,000)	(1,711,000)
Prepaid expenses and other assets	44,000	(198,000)
Payables to customers	(23,021,000)	(2,344,000)
Payables to non-customers	(659,000)	4,305,000
Drafts payable	(213,000)	1,910,000
Payables to broker-dealers and clearing organizations	510,000	453,000
Accounts payable and accrued liabilities	214,000	(274,000)
Securities loaned	(121,607,000)	58,449,000
Securities sold, not yet purchased, at fair value	(85,000)	11,000
Interest payable	30,000
Lease liabilities	(43,000)	273,000
Taxes payable	86,000	185,000
Net cash provided by / (used in) operating activities	3,390,000	(7,702,000)
Cash Flows From Investing Activities
Purchase of furniture, equipment, and leasehold improvements		(579,000)
Purchase of software	(183,000)	(387,000)
Net cash used in investing activities	(183,000)	(966,000)
Cash Flows From Financing Activities
Purchase of StockCross common stock		(3,665,000)
Treasury stock sales - StockCross		172,000
Net cash used in financing activities		(3,493,000)
Net increase / (decrease) in cash and cash equivalents, and cash and securities segregated for regulatory purposes	3,207,000	(12,161,000)
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	232,801,000	201,877,000
Cash and cash equivalents - end of period	5,220,000	5,892,000
Cash and securities segregated for regulatory purposes - end of period	227,581,000	195,985,000
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - end of period	232,801,000	201,877,000
Supplemental cash flow information
Cash paid during the period for income taxes	17,000	5,500
Cash paid during the period for interest	$ 116,000	$ 103,000