Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statements of Operations
Revenues, net	$ 4,101	$ 749
Cost of product revenues	10,718	282
Gross profit (loss)	(6,617)	467
Operating expenses:
Research and development	6,246	13,500	$ 9,858
Selling and marketing	43,444	23,285	1,085
General and administrative	14,698	12,735	7,915
Total operating expenses	64,388	49,520	18,858
Loss from operations	(71,005)	(49,053)	(18,858)
Other income (expense)
Interest income	25	309	252
Interest expense	(3,914)	(3,109)
Total other income (expense), net	(3,889)	(2,800)	252
Net loss	$ (74,894)	$ (51,853)	$ (18,606)
Net loss per share (basic) (in dollars per share)	$ (0.77)	$ (0.61)	$ (0.38)
Net loss per share (diluted) (in dollars per share)	$ (0.77)	$ (0.61)	$ (0.38)
Weighted-average common shares (basic) (in shares)	97,072,847	84,683,084	49,432,487
Weighted-average common shares (diluted) (in shares)	97,072,847	84,683,084	49,432,487
Comprehensive loss:
Net loss	$ (74,894)	$ (51,853)	$ (18,606)
Other comprehensive income:
Unrealized loss on marketable securities	(3)	3
Comprehensive loss	$ (74,897)	$ (51,850)	$ (18,606)