Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES:
Net income	$ 9,039	$ 8,161
Depreciation and amortization	3,796	2,138
Stock-based compensation expense	319	386
Gain on sale of investment		(125)
Provision for deferred income taxes	227	(543)
Non-cash investment loss	0	(1,009)
Non-cash interest income	0	(131)
Equity in loss of affiliate company	172	400
Changes in operating assets and liabilities:
Accounts receivable, net	(2,277)	5,489
Interest receivable	(125)	0
Other current assets	(605)	(358)
Other long-term assets	(61)	22
Accounts payable	321	311
Accrued payroll	244	(602)
Deferred revenue, current portion	941	633
Accrued expenses	83	168
Other current liabilities	(2,869)	2,945
Deferred revenue, net of current portion	164	(23)
Net cash provided by operating activities	8,915	20,966
INVESTING ACTIVITIES:
Purchases of property and equipment	(5,425)	(6,875)
Advances on note and interest receivable	(550)	(1,000)
Purchase of intangible asset	(400)	0
Purchase of long-term investment	(1,800)
Proceeds from payments on notes receivable	183
Proceeds from sale of investments	0	135
Net cash used in investing activities	(7,992)	(7,740)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option	107
Repurchases of common stock	(9,688)	(1,639)
Net cash used in financing activities	(9,581)	(1,639)
Effects of exchange rate changes on cash	(54)	(46)
Net (decrease) increase in cash	(8,712)	11,541
Cash at beginning of year	37,956	26,415
Cash at end of year	29,244	37,956
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes	2,767	1,826
Purchases of property and equipment, accrued but not paid	$ 1,728	$ 0