Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash	$ 29,244	$ 37,956
Accounts receivable, net	5,547	3,270
Notes and interest receivable, current portion	220
Other current assets	1,826	1,263
Total current assets	36,837	42,489
Investments	6,355	1,921
Notes and interest receivable, net of current portion	147	2,681
Property and equipment, at cost less accumulated depreciation	10,371	6,914
Other long-term assets	4,438	3,020
Total assets	58,148	57,025
Current liabilities:
Accounts payable	2,763	714
Deferred revenue, current portion	2,263	1,322
Accrued payroll	2,145	1,901
Accrued expenses	404	321
Income tax payable	1,004	954
Other current liabilities	2,274	4,850
Total current liabilities	10,853	10,062
Deferred revenue, net of current portion	164
Deferred tax liability	549	818
Long-term lease obligation	2,708	1,994
Total noncurrent liabilities	3,421	2,812
Commitments and contingencies (Note 7)
Stockholders’ equity:
Common stock, $0.01 par value: Authorized shares - 20,000,000; Issued shares – 9,001,311 and 8,929,368 at December 31, 2021 and 2020, respectively; Outstanding shares – 8,689,815 and 8,885,797 at December 31, 2021 and 2020, respectively	90	89
Additional paid-in capital	16,261	15,836
Treasury stock, 311,496 and 43,571 shares as of December 31, 2021 and 2020, respectively, at cost	(11,327)	(1,639)
Accumulated other comprehensive loss	(194)	(140)
Accumulated income	39,044	30,005
Total stockholders’ equity	43,874	44,151
Total liabilities and stockholders’ equity	$ 58,148	$ 57,025