CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (loss)	Accumulated Deficit
Balance at Dec. 31, 2020	$ 6,118	$ 25	$ 241,649	$ 12	$ (235,568)
Balance (in shares) at Dec. 31, 2020		24,976,142
Share-based compensation expense	7,231		7,231
Exercise of stock options	1,266		1,266
Exercise of stock options, shares		591,257
Sale of shares under Open Market sale agreement, shares		891,368
Sale of shares under Open Market Sale Agreement , net	7,941	$ 1	7,940
Unrealized gain (loss) on short-term investments	(26)			(26)
Net loss	(80,534)				(80,534)
Balance at Dec. 31, 2021	$ (58,004)	$ 26	258,086	14	(316,102)
Balance (in shares) at Dec. 31, 2021	26,458,767	26,458,767
Share-based compensation expense	$ 7,164		7,164
Exercise of stock options	$ 81		81
Exercise of stock options, shares	68,526	68,526
Sale of shares under Open Market sale agreement, shares		1,982,773
Sale of shares under Open Market Sale Agreement , net	$ 3,808	$ 2	3,806
Unrealized gain (loss) on short-term investments	(8)			(8)
Net loss	(62,222)				(62,222)
Balance at Dec. 31, 2022	$ (109,181)	$ 28	$ 269,137	$ (22)	$ (378,324)
Balance (in shares) at Dec. 31, 2022	28,510,066	28,510,066