Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
OPERATING ACTIVITIES:
Net income	$ 13,881	$ 9,039
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,697	3,796
Stock-based compensation expense	210	319
Benefit for deferred income taxes	(77)	(227)
Non-cash investment loss	1,450	0
Non-cash interest income	(55)	0
Equity in (earnings) loss of affiliate company	(275)	172
Changes in operating assets and liabilities:
Accounts receivable, net	(7,673)	(2,277)
Other current assets	(1,756)	(730)
Other long-term assets	(25)	(61)
Accounts payable	751	321
Accrued payroll	(257)	244
Deferred revenue, current portion	(1,169)	941
Accrued expenses	121	83
Other current liabilities	(1,268)	(2,869)
Deferred revenue, net of current portion	309	164
Net cash provided by operating activities	9,864	8,915
INVESTING ACTIVITIES:
Purchases of property and equipment	(8,735)	(5,425)
Advances on note and interest receivable	0	(550)
Purchase of intangible asset	0	(400)
Purchase of long-term investment	0	(1,800)
Proceeds from payments on notes receivable	220	183
Purchases of marketable securities	(6,944)	0
Maturities of marketable securities	1,975	0
Net cash used in investing activities	(13,484)	(7,992)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option	0	107
Repurchases of common stock	(5,335)	(9,688)
Net cash used in financing activities	(5,335)	(9,581)
Effects of exchange rate changes on cash	110	(54)
Net decrease in cash	(8,845)	(8,712)
Cash at beginning of year	29,244	37,956
Cash at end of year	20,399	29,244
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes	6,615	2,767
Purchases of property and equipment, accrued but not paid	$ 225	$ 1,728