Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Total revenues, net	$ 7,311	$ 7,919	$ 21,742	$ 19,392
Cost of revenues:
Total cost of revenues	5,619	5,428	16,640	15,340
Gross profit	1,692	2,491	5,102	4,052
Operating expenses:
Research and development	1,734	1,046	4,313	3,943
Selling, general and administrative	1,824	1,839	5,334	5,555
Total operating expenses	3,558	2,885	9,647	9,498
Loss from operations	(1,866)	(394)	(4,545)	(5,446)
Other (expense) income:
Change in fair value of common stock warrant liability	(1,803)	120	(3,304)	1,450
Interest expense, net	(10)	(41)	(45)	(96)
Other income, net	148		163
Total other (expense) income	(1,665)	79	(3,186)	1,354
Loss before provision for income taxes	(3,531)	(315)	(7,731)	(4,092)
Income taxes
Net loss	$ (3,531)	$ (315)	$ (7,731)	$ (4,092)
Loss per share, basic and diluted	$ (0.06)	$ (0.01)	$ (0.14)	$ (0.09)
Weighted average number of shares outstanding:
Basic and Diluted	57,735,846	49,173,773	54,450,815	47,718,965
Product [Member]
Revenues:
Total revenues, net	$ 6,978	$ 7,321	$ 18,872	$ 17,786
Cost of revenues:
Cost of revenues	5,385	5,112	15,153	14,436
Contract [Member]
Revenues:
Total revenues, net	333	598	2,870	1,606
Cost of revenues:
Cost of revenues	$ 234	$ 316	$ 1,487	$ 904