CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Total revenue	$ 17,123	$ 12,509
Operating expense:
Cost of revenue	11,133	9,893
Gross profit	5,990	2,616
Research and development expense	1,571	1,870
Selling, general and administrative expense	2,934	3,542
Income (loss) from operations	1,485	(2,796)
Interest expense	(496)	(210)
Income (loss) before provision for income taxes	989	(3,006)
Provision for income taxes
Net income (loss)	$ 989	$ (3,006)
Net income (loss) per share-basic (in dollars per share)	$ 0.03	$ (0.08)
Weighted average number of basic common shares outstanding (in shares)	38,158,586	36,596,372
Net income (loss) per share-diluted (in dollars per share)	$ 0.03	$ (0.08)
Weighted average number of diluted common shares outstanding (in shares)	38,545,586	36,596,372
Product Revenue [Member]
Revenue:
Total revenue	$ 16,422	$ 11,852
Other Revenue [Member]
Revenue:
Total revenue	$ 701	$ 657