Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue
Total net revenue	$ 34,303	$ 20,100
Cost of revenue
Total cost of revenue	11,759	8,524
Expenses
Marketing	151	255
General and administrative	3,495	1,826
Research and development	5,516	3,353
Income from operations	13,382	6,142
Investment income (loss)	34	(363)
Other income, net	99	469
Income before income taxes	13,515	6,248
Income taxes	2,546	4
Net income	$ 10,969	$ 6,244
Earnings per share:
Basic (in dollars per share)	$ 1.24	$ 0.71
Diluted (in dollars per share)	$ 1.22	$ 0.70
Basic weighted average common shares outstanding (in shares)	8,873,071	8,796,321
Diluted weighted average common shares outstanding (in shares)	8,967,901	8,948,518
Product [Member]
Revenue
Total net revenue	$ 5,725	$ 1,349
Cost of revenue
Total cost of revenue		136
Service [Member]
Revenue
Total net revenue	28,578	18,751
Cost of revenue
Total cost of revenue	$ 11,759	$ 8,388