Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Total revenue	$ 6,179	$ 6,202	$ 11,532	$ 12,069
Operating expenses
Selling, general and administrative	7,892	11,776	18,512	22,983
Research and development	13,093	13,315	26,686	24,271
Cost of goods sold	778	656	1,430	1,185
Total operating expenses	21,763	25,747	46,628	48,439
Loss from operations	(15,584)	(19,545)	(35,096)	(36,370)
Other income (expense)
Foreign exchange loss	(2)	(3)	(3)	(3)
Interest income	1,061	1,635	2,343	3,295
Interest expense	(58)	(58)	(116)	(116)
Total other income (expense), net	1,001	1,574	2,224	3,176
Net loss	(14,583)	(17,971)	(32,872)	(33,194)
Other comprehensive loss:
Unrealized (loss) income on available-for-sale debt securities	(19)	(12)	(54)	71
Comprehensive loss	$ (14,602)	$ (17,983)	$ (32,926)	$ (33,123)
Net loss per share, basic (in dollars per share)	$ (0.54)	$ (0.67)	$ (1.22)	$ (1.23)
Net loss per share, diluted (in dollars per share)	$ (0.54)	$ (0.67)	$ (1.22)	$ (1.23)
Weighted-average number of common shares outstanding, basic (in shares)	27,010,013	26,879,089	26,995,356	26,878,672
Weighted-average number of common shares outstanding, diluted (in shares)	27,010,013	26,879,089	26,995,356	26,878,672
Product sales, net
Total revenue	$ 6,179	$ 6,202	$ 11,532	$ 12,069