CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 31,558	$ 58,600	$ 86,894	$ 112,626
Cost of sales	21,668	7,870	54,197	14,981
Gross profit	9,890	50,730	32,697	97,645
Operating expenses:
Selling, general and administrative	38,116	37,656	88,662	72,581
Research and development	18,971	17,069	43,844	30,999
In-process research and development		2,245		2,245
Total operating expenses	57,087	56,970	132,506	105,825
Loss from operations	(47,197)	(6,240)	(99,809)	(8,180)
Non-operating (expense) income:
Interest income	590	800	1,286	1,588
Interest expense	(1,872)	(1,013)	(2,753)	(1,013)
Other income (expense), net	1,201	216	(510)	148
Total non-operating (expense) income	(81)	3	(1,977)	723
Loss before taxes	(47,278)	(6,237)	(101,786)	(7,457)
Income tax (benefit) provision	(7,384)	72	(7,834)	194
Net loss	$ (39,894)	$ (6,309)	$ (93,952)	$ (7,651)
Basic and diluted net loss per share (in dollar per share)	$ (0.90)	$ (0.17)	$ (2.13)	$ (0.21)
Weighted average shares used to compute basic and diluted net loss per share (in shares)	44,335	36,470	44,078	36,338