Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
OPERATING ACTIVITIES:
Net income	$ 11,526	$ 3,845
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	2,333	1,769
Stock-based compensation expense	160	255
Deferred income taxes	72
Non-cash interest income		(55)
Equity in (gain) loss of affiliate company	(157)	267
Changes in operating assets and liabilities:
Accounts receivable, net	(10,655)	(3,778)
Other current assets	(688)	(114)
Other long-term assets	(236)	(37)
Accounts payable	611	552
Accrued payroll	(194)	467
Deferred revenue, current portion	(1,001)	(282)
Accrued expenses	160	33
Other current liabilities	(827)	(2,605)
Deferred revenue, net of current portion	254	88
Net cash provided by operating activities	1,358	405
INVESTING ACTIVITIES:
Purchases of property and equipment	(5,760)	(2,612)
Advances on notes and interest receivable		(550)
Proceeds from payments on notes receivable	110	55
Purchase of intangible assets		(400)
Purchase of long-term investment		(1,000)
Net cash used for investing activities	(5,650)	(4,507)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option		107
Repurchases of common stock	(3,679)	(7,759)
Net cash used for financing activities	(3,679)	(7,652)
Effects of exchange rate changes on cash	243	8
Net decrease in cash	(7,728)	(11,746)
Cash at beginning of period	29,244	37,956
Cash at end of period	21,516	26,210
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for income taxes	5,330	$ 1,754
Purchases of property and equipment, accrued but not paid	$ 1,093