Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue
Total net revenue	$ 48,248	$ 35,873
Cost of revenue
Total cost of revenue	22,902	15,427
Expenses
Marketing	279	132
General and administrative	4,550	3,866
Research and development	8,859	5,153
Income from operations	11,658	11,295
Investment loss	(172)	(1,044)
Other income	277	378
Income before income taxes	11,763	10,629
Income taxes	2,724	2,468
Net income	$ 9,039	$ 8,161
Earnings per share:
Basic (in dollars per share)	$ 1.03	$ 0.91
Earnings per share (in dollars per share)	$ 1.03	$ 0.91
Basic weighted average common shares outstanding (in shares)	8,777,066	8,919,602
Diluted weighted average common shares outstanding (in shares)	8,809,603	9,014,985
Service [Member]
Revenue
Total net revenue	$ 42,383	$ 32,273
Cost of revenue
Total cost of revenue	22,902	15,427
Product [Member]
Revenue
Total net revenue	$ 5,865	$ 3,600