Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 8,161	$ 10,969
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,138	1,012
Stock-based compensation expense	386	191
Gain on sale of investment	(125)	(34)
Provision for deferred income taxes	543	555
Non-cash investment loss	1,009
Non-cash interest income	(131)	(49)
Equity in loss of affiliate company	400	332
Changes in operating assets and liabilities:
Accounts receivable, net	5,489	(5,028)
Other current assets	(358)	224
Other long-term assets	22	61
Accounts payable	311	131
Accrued payroll	(602)	1,358
Deferred revenue, current portion	633	(92)
Accrued expenses	168	82
Other current liabilities	2,945	961
Deferred revenue, net of current portion	(23)	(88)
Net cash provided by operating activities	20,966	10,585
INVESTING ACTIVITIES:
Purchases of property and equipment	(6,875)	(1,676)
Advances on note and interest receivable	(1,000)	(2,000)
Proceeds from sale of investments	135	379
Net cash used in investing activities	(7,740)	(3,297)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option		210
Repurchases of common stock	(1,639)
Net cash (used in) provided by financing activities	(1,639)	210
Effects of exchange rate changes on cash	(46)	(2)
Net increase in cash	11,541	7,496
Cash at beginning of year	26,415	18,919
Cash at end of year	37,956	26,415
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 1,826	$ 1,159