CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Product sales, net	$ 45,581	$ 38,326	$ 132,520	$ 111,004
Other revenue	0	225	0	667
Total revenue	45,581	38,551	132,520	111,671
Cost of product sales	14,973	13,318	45,451	40,132
Gross profit	30,608	25,233	87,069	71,539
Research and development	5,676	5,046	16,141	14,698
Selling, general and administrative	29,989	26,975	90,123	79,984
Total operating expenses	35,665	32,021	106,264	94,682
Loss from operations	(5,057)	(6,788)	(19,195)	(23,143)
Other income (expense):
Interest income	1,262	342	3,196	578
Interest expense	(150)	(105)	(444)	(143)
Other (expense) income	(1)	(5)	(18)	98
Total other income	1,111	232	2,734	533
Loss before income taxes	(3,946)	(6,556)	(16,461)	(22,610)
Income tax (benefit) expense	(286)	21	(286)	21
Net loss	$ (3,660)	$ (6,577)	$ (16,175)	$ (22,631)
Net loss per common share:
Basic (in USD per share)	$ (0.08)	$ (0.14)	$ (0.34)	$ (0.48)
Diluted (in USD per share)	$ (0.08)	$ (0.14)	$ (0.34)	$ (0.48)
Weighted-average common shares outstanding:
Basic (in shares)	47,649	47,182	47,537	47,096
Diluted (in shares)	47,649	47,182	47,537	47,096
Revenue, Product and Service [Extensible List]	Product [Member]	Product [Member]	Product [Member]	Product [Member]
Cost, Product and Service [Extensible List]	Product [Member]	Product [Member]	Product [Member]	Product [Member]