Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES:
Net income	$ 1,256	$ 8,670
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization	1,695	1,328
Stock-based compensation expense		10
Provision for deferred income taxes	(61)	(58)
Non-cash interest income	37
Equity in loss of affiliate company	295	103
Changes in operating assets and liabilities:
Accounts receivable, net	(792)	(12,717)
Other current assets	259	(1,159)
Other long-term assets	(45)	(129)
Accounts payable	(503)	832
Accrued payroll	(365)	1,225
Deferred revenue, current portion	651	(1,232)
Accrued expenses	301	234
Other current liabilities	279	3,054
Deferred revenue, net of current portion	(59)	152
Net cash provided by operating activities	2,948	313
INVESTING ACTIVITIES:
Purchase of marketable securities	(440)
Maturities of marketable securities	411
Purchases of property and equipment	(1,628)	(2,737)
Proceeds from payments on notes receivable	55	55
Net cash used for investing activities	(1,602)	(2,682)
FINANCING ACTIVITIES:
Repurchases of common stock		(2,332)
Net cash used for financing activities		(2,332)
Effects of exchange rate changes on cash	(53)	1
Net increase (decrease) in cash	1,293	(4,700)
Cash at beginning of period	20,399	29,244
Cash at end of period	21,692	24,544
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Purchases of property and equipment, accrued but not paid	$ 309	$ 2,306