Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES:
Net income	$ 3,845	$ 3,247
Depreciation and amortization	1,769	691
Stock-based compensation expense	255	123
Non-cash investment expense	0	1,009
Non-cash interest income	(55)	(55)
Equity in loss of affiliate company	267	176
Changes in operating assets and liabilities:
Accounts receivable, net	(3,778)	623
Other current assets	(114)	(153)
Other long-term assets	(37)	(9)
Accounts payable	552	28
Accrued payroll	467	(854)
Deferred revenue, current portion	(282)	4,112
Accrued expenses	33	85
Other current liabilities	(2,605)	705
Deferred revenue, net of current portion	88	(14)
Net cash provided by operating activities	405	9,714
INVESTING ACTIVITIES:
Purchases of property and equipment	(2,612)	(2,767)
Advances on notes and interest receivable	(550)	(1,000)
Proceeds from payments on notes receivable	55	0
Purchase of intangible assets	(400)	0
Purchase of long-term investment	(1,000)	0
Net cash used for investing activities	(4,507)	(3,767)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option	107	0
Repurchases of common stock	(7,759)	0
Net cash used for financing activities	(7,652)	0
Effects of exchange rate changes on cash	8	(46)
Net (decrease) increase in cash	(11,746)	5,901
Cash at beginning of period	37,956	26,415
Cash at end of period	26,210	32,316
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for income taxes	$ 1,754	$ 0