CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 71,269	$ 74,710	$ 211,635	$ 220,771
Cost of sales	16,861	15,370	51,757	49,762
Gross profit	54,408	59,340	159,878	171,009
Operating expenses:
Selling, general and administrative	47,149	44,470	140,998	131,691
Research and development	28,870	28,846	87,459	74,321
In-process research and development		5,000	10,000	10,000
Litigation-related settlement		(30,000)	(30,000)	(30,000)
Total operating expenses	76,019	48,316	208,457	186,012
(Loss) income from operations	(21,611)	11,024	(48,579)	(15,003)
Non-operating expense:
Interest income	744	291	1,415	1,016
Interest expense	(3,481)	(3,413)	(10,311)	(9,948)
Other expense, net	(2,981)	(1,470)	(9,792)	(3,097)
Total non-operating expense	(5,718)	(4,592)	(18,688)	(12,029)
(Loss) income before taxes	(27,329)	6,432	(67,267)	(27,032)
Income tax provision	247	202	468	689
Net (loss) income	$ (27,576)	$ 6,230	$ (67,735)	$ (27,721)
Basic net (loss) income per share (in dollar per share)	$ (0.58)	$ 0.13	$ (1.43)	$ (0.60)
Diluted net (loss) income per share (in dollar per share)	$ (0.58)	$ 0.13	$ (1.43)	$ (0.60)
Weighted average shares used to compute basic net (loss) income per share	47,614	46,737	47,346	46,255
Weighted average shares used to compute diluted net (loss) income per share	47,614	49,320	47,346	46,255