CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Product sales, net	$ 117,850	$ 90,857	$ 62,760
Other revenue	0	0	1,164
Total revenue	117,850	90,857	63,924
Cost of product sales	37,571	32,160	30,354
Gross profit	80,279	58,697	33,570
Research and development	30,391	13,599	12,944
Selling, general and administrative	61,139	49,007	35,610
Total operating expenses	91,530	62,606	48,554
Loss from operations	(11,251)	(3,909)	(14,984)
Other income (expense):
Increase in fair value of warrants	0	(2,524)	(257)
Loss on extinguishment of debt	0	(838)	(860)
Interest income	1,614	897	14
Interest expense	(8)	(1,732)	(1,107)
Other expense	(20)	(31)	(92)
Total other income (expense)	1,586	(4,228)	(2,302)
Net loss	$ (9,665)	$ (8,137)	$ (17,286)
Net loss per share attributable to common shareholders (Basic and Diluted) (in dollars per share)	$ (0.22)	$ (0.20)	$ (0.52)
Weighted average number of common shares outstanding (Basic and Diluted) (in shares)	44,180	40,242	33,355