Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING ACTIVITIES:
Net income	$ 1,040	$ 1,047
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	855	302
Stock-based compensation expense	57	62
Non-cash investment loss		1,009
Non-cash interest income	(37)	(32)
Equity in loss of affiliate company	133	41
Changes in operating assets and liabilities:
Accounts receivable, net	(1,799)	676
Other current assets	204	(74)
Other long-term assets	(33)	(6)
Accounts payable	67	(31)
Accrued payroll	(358)	(1,091)
Deferred revenue, current portion	(528)	3,422
Accrued expenses	211	140
Other current liabilities	(2,239)	236
Deferred revenue, net of current portion	101	(8)
Net cash (used for) provided by operating activities	(2,326)	5,693
INVESTING ACTIVITIES:
Purchases of property and equipment	(1,496)	(539)
Advances on notes and interest receivable	(550)	(1,000)
Proceeds from payments on notes receivable	18
Net cash used for investing activities	(2,028)	(1,539)
FINANCING ACTIVITIES:
Sale of capital stock pursuant to exercise of option	107
Repurchases of common stock	(2,712)
Net cash used for financing activities	(2,605)
Effects of exchange rate changes on cash	4	(31)
Net (decrease) increase in cash	(6,955)	4,123
Cash at beginning of period	37,956	26,415
Cash at end of period	$ 31,001	$ 30,538