CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows From Operating Activities
Net income	$ 2,275,000	$ 976,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense	171,000	291,000
Depreciation and amortization	392,000	448,000
Changes in
Receivables from customers	3,085,000	15,884,000
Receivables from non-customers	(9,000)
Receivables from and deposits with broker-dealers and clearing organizations	7,728,000	(109,000)
Securities borrowed	137,170,000	131,306,000
Securities owned, at fair value	(1,465,000)	(662,000)
Prepaid expenses and other assets	438,000	44,000
Prepaid service contract	177,000
Payables to customers	4,198,000	(23,021,000)
Payables to non-customers	(1,800,000)	(659,000)
Drafts payable	(1,319,000)	(213,000)
Payables to broker-dealers and clearing organizations	4,237,000	510,000
Accounts payable and accrued liabilities	(46,000)	214,000
Securities loaned	(145,420,000)	(121,607,000)
Securities sold, not yet purchased, at fair value	7,000	(85,000)
Interest payable	22,000	30,000
Lease liabilities	(68,000)	(43,000)
Taxes payable	14,000	86,000
Net cash provided by operating activities	9,787,000	3,390,000
Cash Flows From Investing Activities
Purchase of OpenHand common stock	(850,000)
Purchase of furniture, equipment, and leasehold improvements	(110,000)
Purchase of software	(64,000)	(183,000)
Net cash used in investing activities	(1,024,000)	(183,000)
Cash Flows From Financing Activities
Repayments of long-term debt	(249,000)
Net cash used in financing activities	(249,000)
Net change in cash and cash equivalents, and cash and securities segregated for regulatory purposes	8,514,000	3,207,000
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - beginning of year	328,556,000	229,594,000
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - end of period	337,070,000	232,801,000
Cash and cash equivalents - end of period	4,097,000	5,220,000
Cash and securities segregated for regulatory purposes - end of period	332,973,000	227,581,000
Cash and cash equivalents, and cash and securities segregated for regulatory purposes - end of period	337,070,000	232,801,000
Supplemental cash flow information
Cash paid during the period for income taxes	1,000	17,000
Cash paid during the period for interest	81,000	116,000
Non-cash investing and financing activities
Shares issued for OpenHand purchase	$ 1,381,000