Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue
Total net revenue	$ 8,053	$ 7,512	$ 15,946	$ 14,478
Cost of revenue
Total cost of revenue	3,694	2,899	7,201	5,433
Expenses
Marketing	31	51	63	89
General and administrative	704	1,100	1,762	1,694
Research and development	921	861	1,838	2,059
Income from operations	2,703	2,601	5,082	5,203
Investment (loss) income	(95)	(21)	(1,145)	4
Other income	117	146	253	249
Income before income taxes	2,725	2,726	4,190	5,456
Income taxes	525	618	943	1,276
Net income	$ 2,200	$ 2,108	$ 3,247	$ 4,180
Basic (in dollars per share)	$ 0.25	$ 0.24	$ 0.36	$ 0.47
Diluted (in dollars per share)	$ 0.24	$ 0.23	$ 0.36	$ 0.46
Basic weighted average common shares outstanding (in shares)	8,924,988	8,850,988	8,924,988	8,846,155
Diluted weighted average common shares outstanding (in shares)	9,019,025	9,004,664	9,020,470	9,015,669
Service [Member]
Revenue
Total net revenue	$ 8,053	$ 6,812	$ 15,946	$ 12,978
Cost of revenue
Total cost of revenue	3,694	2,899	7,201	5,433
Product [Member]
Revenue
Total net revenue		700		1,500
Cost of revenue
Total cost of revenue