Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statements of Operations and Comprehensive Loss
Revenues, net	$ 3,002	$ 1,287	$ 6,888	$ 2,587
Cost of product revenues	1,425	2,711	5,183	5,017
Gross profit (loss)	1,577	(1,424)	1,705	(2,430)
Operating expenses:
Research and development	788	1,593	2,901	4,568
Selling and marketing	5,560	9,386	23,523	30,263
General and administrative	2,815	3,371	9,837	11,386
Loss on disposition of assets	11,122		11,122
Total operating expenses	20,285	14,350	47,383	46,217
Loss from operations	(18,708)	(15,774)	(45,678)	(48,647)
Other income (expense)
Interest income	46	1	50	24
Interest expense	(1,004)	(999)	(2,699)	(2,914)
Total other income (expense), net	(958)	(998)	(2,649)	(2,890)
Loss before benefit from income taxes	(19,666)	(16,772)	(48,327)	(51,537)
Benefit from income taxes			4,675
Net loss	$ (19,666)	$ (16,772)	$ (43,652)	$ (51,537)
Net loss per share (basic) (in dollars per share)	$ (0.53)	$ 7.20	$ (2.91)	$ (22.80)
Net loss per share (diluted) (in dollars per share)	$ (0.53)	$ 7.20	$ (2.91)	$ (22.80)
Weighted-average common shares (basic) (in shares)	36,997,836	2,343,930	14,998,534	2,251,205
Weighted-average common shares (diluted) (in shares)	36,997,836	2,343,930	14,998,534	2,251,205
Comprehensive loss:
Net loss	$ (19,666)	$ (16,772)	$ (43,652)	$ (51,537)
Other comprehensive income:
Unrealized loss on marketable securities				(3)
Comprehensive loss	$ (19,666)	$ (16,772)	$ (43,652)	$ (51,540)