Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Total revenues, net	$ 7,159	$ 6,279	$ 14,517	$ 13,052
Cost of revenues:
Total cost of revenues	5,590	5,708	10,459	10,773
Gross profit	1,569	571	4,058	2,279
Operating expenses:
Research and development	1,457	1,788	2,941	3,630
Selling, general and administrative	1,904	1,690	4,074	3,514
Total operating expenses	3,361	3,478	7,015	7,144
Loss from operations	(1,792)	(2,907)	(2,957)	(4,865)
Other (expense) income:
Change in fair value of common stock warrant liability	226	2,642	1,372	(4,566)
Interest expense, net	(225)	(205)	(439)	(415)
Gain on forgiveness of debt				1,963
Other income, net	351	192	447	227
Total other income (expense)	352	2,629	1,380	(2,791)
Loss before provision for income taxes	(1,440)	(278)	(1,577)	(7,656)
Income taxes
Net loss	$ (1,440)	$ (278)	$ (1,577)	$ (7,656)
Loss per share, basic	$ (0.02)	$ 0.00	$ (0.02)	$ (0.11)
Loss per share, diluted	$ (0.02)	$ 0.00	$ (0.02)	$ (0.11)
Weighted average number of shares outstanding:
Basic	73,895,212	72,193,205	73,368,347	71,238,060
Diluted	73,895,212	72,193,205	73,368,347	71,238,060
Product [Member]
Revenues:
Total revenues, net	$ 7,026	$ 5,742	$ 14,053	$ 11,847
Cost of revenues:
Cost of revenues	5,522	5,466	10,309	10,173
Contract [Member]
Revenues:
Total revenues, net	133	537	464	1,205
Cost of revenues:
Cost of revenues	$ 68	$ 242	$ 150	$ 600