CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Equity Method Investee	ATM	Follow On Offering	Common Stock	Common Stock ATM	Common Stock Follow On Offering	Additional Paid-in Capital	Additional Paid-in Capital Equity Method Investee	Additional Paid-in Capital ATM	Additional Paid-in Capital Follow On Offering	Accumulated Other Comprehensive Gain (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 195,995				$ 5			$ 524,358					$ (328,368)
Beginning balance, Shares at Dec. 31, 2020					50,265,575
Issuance of common stock, net of discounts and issuance costs			$ 1,454	$ 49,744			$ 1			$ 1,454	$ 49,743
Issuance of common stock, net of discounts and issuance costs, Shares						114,914	6,596,306
Vesting of common stock from option exercises	13							13
Vesting of common stock from option exercises, Shares					3,091
Issuance of common stock from option exercises	145							145
Issuance of common stock from option exercises, Shares					59,465
Issuance of common stock pursuant to employee stock purchase plan	826							826
Issuance of common stock pursuant to employee stock purchase plan, Shares					110,923
Stock-based compensation	17,245							17,245
Other comprehensive loss	(7)											$ (7)
Net loss	(95,764)												(95,764)
Ending balance at Dec. 31, 2021	169,651				$ 6			593,784				(7)	(424,132)
Ending balance, Shares at Dec. 31, 2021					57,150,274
Issuance of common stock, net of discounts and issuance costs, Shares			0
Issuance of common stock from option exercises	1							1
Issuance of common stock from option exercises, Shares					293
Issuance of common stock pursuant to employee stock purchase plan	595							595
Issuance of common stock pursuant to employee stock purchase plan, Shares					226,453
Issuance of common stock from RSU vesting, Shares					106,890
Stock-based compensation	13,054	$ 79						13,054	$ 79
Other comprehensive loss	(397)											(397)
Net loss	(5,005)												(5,005)
Ending balance at Dec. 31, 2022	$ 177,978				$ 6			$ 607,513				$ (404)	$ (429,137)
Ending balance, Shares at Dec. 31, 2022					57,483,910