Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES:
Net income	$ 6,379	$ 6,042
Depreciation and amortization	2,697	1,460
Stock-based compensation expense	287	330
Non-cash investment expense		1,009
Non-cash interest income	(72)	(93)
Equity in loss of affiliate company	214	268
Changes in operating assets and liabilities:
Accounts receivable, net	(10,812)	4,714
Other current assets	(978)	(312)
Other long-term assets	(22)	185
Accounts payable	814	62
Accrued payroll	848	(487)
Deferred revenue, current portion	230	2,786
Accrued expenses	26	(46)
Other current liabilities	(2,844)	(993)
Deferred revenue, net of current portion	76	259
Net cash (used for) provided by operating activities	(3,157)	15,184
INVESTING ACTIVITIES:
Purchases of property and equipment	(3,233)	(6,173)
Advances on notes and interest receivable	(550)	(1,000)
Proceeds from payments on notes receivable	110
Purchase of intangible assets	(400)
Purchase of long-term investment	(1,000)
Net cash used for investing activities	(5,073)	(7,173)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option	107
Repurchases of common stock	(9,261)
Net cash used for financing activities	(9,154)
Effects of exchange rate changes on cash	(5)	(35)
Net (decrease) increase in cash	(17,389)	7,976
Cash at beginning of period	37,956	26,415
Cash at end of period	20,567	34,391
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for income taxes	$ 2,626	$ 1,826