Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 80,683	$ 54,997	$ 46,363
Cost of goods sold	36,348	23,599	16,353
Gross profit	44,335	31,398	30,010
Operating expenses:
Sales and marketing	48,456	37,405	37,924
Research and development	10,456	8,704	10,107
General and administrative	31,773	32,310	36,369
Restructuring		390	499
Total operating expenses	90,685	78,809	84,899
Loss from operations	(46,350)	(47,411)	(54,889)
Other income (expense), net:
Interest income	4	205	1,405
Interest expense	(8,254)	(9,438)	(4,567)
Change in fair value of derivative liability	(14,460)	(10,470)
Other income (expense), net	6,562	35	(2)
Total other income (expense), net	(16,148)	(19,668)	(3,164)
Loss from continuing operations before income taxes	(62,498)	(67,079)	(58,053)
Income tax expense	21	33	34
Loss from continuing operations	(62,519)	(67,112)	(58,087)
Income (loss) from discontinued operations, net of income taxes	37	(22,835)	(48,731)
Net loss	$ (62,482)	$ (89,947)	$ (106,818)
Basic and diluted net loss per share attributable to common stock holders
Continuing operations	$ (1.10)	$ (1.34)	$ (1.43)
Discontinued operations	0.00	(0.45)	(1.20)
Basic and diluted net loss per share	$ (1.10)	$ (1.79)	$ (2.63)
Weighted average outstanding common shares used for net income (loss) per share attributable to common stockholders:
Basic and diluted	57,057,107	50,233,175	40,654,272