Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total revenue	$ 664	$ 2,500	$ 3,090
Total cost of revenue	100	2	1,398
Gross profit	564	2,498	1,692
Research and development expense	30,413	24,111	9,840
Sales, marketing, general and administrative expense	24,041	22,256	5,917
Gain on disposal of fixed assets	0	0	(450)
Total operating expenses	54,454	46,367	15,307
Loss from operations	(53,890)	(43,869)	(13,615)
Gain on debt extinguishment	0	692	0
Other income (expense), net	799	(23)	(19)
Net loss	$ (53,091)	$ (43,200)	$ (13,634)
Net loss per share, basic	$ (0.32)	$ (0.27)	$ (0.1)
Net loss per share, diluted	$ (0.32)	$ (0.27)	$ (0.1)
Weighted-average shares outstanding - basic	165,958	160,662	139,829
Weighted-average shares outstanding - diluted	165,958	160,662	139,829
Product [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 0	$ 0	$ 1,347
Cost of Goods and Services	100	2	1,394
Technology Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0	25
Cost of Goods and Services	0	0	4
License [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 664	$ 2,500	$ 1,718