Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash	$ 20,567	$ 37,956
Accounts receivable, net	14,082	3,270
Notes and interest receivable, current portion	220
Other current assets	2,241	1,263
Total current assets	37,110	42,489
Investments	2,707	1,921
Notes and interest receivable, net of current portion	2,995	2,681
Property and equipment, at cost less accumulated depreciation	7,483	6,914
Other long-term assets	3,995	3,020
Total assets	54,290	57,025
Current liabilities:
Accounts payable	1,528	714
Deferred revenue, current portion	1,552	1,322
Accrued payroll	2,749	1,901
Accrued expenses	347	321
Income tax payable	636	954
Other current liabilities	2,480	4,850
Total current liabilities	9,292	10,062
Noncurrent liabilities:
Deferred revenue, net of current portion	76
Deferred tax liability	818	818
Long-term lease obligation	2,446	1,994
Total noncurrent liabilities	3,340	2,812
Stockholders’ equity:
Common stock, $0.01 par value: Authorized shares - 20,000,000; Issued shares – 9,001,311 and 8,929,368 at September 30, 2021 and December 31, 2020, respectively; Outstanding shares – 8,700,569 and 8,885,797 at September 30, 2021 and December 31, 2020, respectively	90	89
Additional paid-in capital	16,229	15,836
Treasury stock, 300,742 and 43,571 shares at September 30, 2021 and December 31, 2020, respectively, at cost	(10,900)	(1,639)
Accumulated other comprehensive loss	(145)	(140)
Accumulated income	36,384	30,005
Total stockholders’ equity	41,658	44,151
Total liabilities and stockholders’ equity	$ 54,290	$ 57,025