CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	At-The-Market Offering	Warrant	Public Offering	Common Stock	Common Stock At-The-Market Offering	Common Stock Warrant	Common Stock Public Offering	Additional Paid-in Capital	Additional Paid-in Capital At-The-Market Offering	Additional Paid-in Capital Warrant	Additional Paid-in Capital Public Offering	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 14,567				$ 2				$ 302,655				$ (288,090)
Beginning balance, shares at Dec. 31, 2020					18,787,579
Exercise of options to purchase common stock	316								316
Exercise of options to purchase common stock, shares					46,807
Stock-based compensation	2,273								2,273
Issuance of common stock upon offering, net of issuance costs				$ 61,868								$ 61,868
Issuance of common stock upon offering, net of issuance costs, shares								3,162,500
Issuance costs related to common stock				$ (560)
Net loss	(10,308)												(10,308)
Ending balance at Mar. 31, 2021	68,716				$ 2				367,112				(298,398)
Ending balance, shares at Mar. 31, 2021					21,996,886
Beginning balance at Dec. 31, 2020	14,567				$ 2				302,655				(288,090)
Beginning balance, shares at Dec. 31, 2020					18,787,579
Net loss	(53,819)
Ending balance at Sep. 30, 2021	34,006				$ 2				375,913				(341,909)
Ending balance, shares at Sep. 30, 2021					22,361,305
Beginning balance at Mar. 31, 2021	68,716				$ 2				367,112				(298,398)
Beginning balance, shares at Mar. 31, 2021					21,996,886
Exercise of options to purchase common stock	2,454								2,454
Exercise of options to purchase common stock, shares					276,089
Stock-based compensation	2,690								2,690
Issuance costs related to common stock	(187)								(187)
Net loss	(21,809)												(21,809)
Ending balance at Jun. 30, 2021	51,864				$ 2				372,069				(320,207)
Ending balance, shares at Jun. 30, 2021					22,272,975
Exercise of options to purchase common stock	752								752
Exercise of options to purchase common stock, shares					88,330
Stock-based compensation	3,092								3,092
Net loss	(21,702)												(21,702)
Ending balance at Sep. 30, 2021	34,006				$ 2				375,913				(341,909)
Ending balance, shares at Sep. 30, 2021					22,361,305
Beginning balance at Dec. 31, 2021	53,505				$ 2				378,750				(325,247)
Beginning balance, shares at Dec. 31, 2021					22,383,830
Stock-based compensation	2,349								2,349
Issuance of common stock upon offering, net of issuance costs		$ 553								$ 553
Issuance of common stock upon offering, net of issuance costs, shares						110,037
Issuance costs related to common stock		$ (17)
Net loss	(8,028)												(8,028)
Ending balance at Mar. 31, 2022	48,379				$ 2				381,652				(333,275)
Ending balance, shares at Mar. 31, 2022					22,493,867
Beginning balance at Dec. 31, 2021	53,505				$ 2				378,750				(325,247)
Beginning balance, shares at Dec. 31, 2021					22,383,830
Issuance of common stock upon offering, net of issuance costs, shares		236,303
Net loss	(34,081)
Ending balance at Sep. 30, 2022	38,929				$ 4				398,253				(359,328)
Ending balance, shares at Sep. 30, 2022					36,829,626
Beginning balance at Mar. 31, 2022	48,379				$ 2				381,652				(333,275)
Beginning balance, shares at Mar. 31, 2022					22,493,867
Common stock issued under Employee Stock Purchase Plan (ESPP)	126								126
Common stock issued under Employee Stock Purchase Plan (ESPP), shares					51,664
Stock-based compensation	2,668								2,668
Net loss	(6,775)												(6,775)
Ending balance at Jun. 30, 2022	44,398				$ 2				384,446				(340,050)
Ending balance, shares at Jun. 30, 2022					22,545,531
Stock-based compensation	2,287								2,287
Issuance of common stock upon offering, net of issuance costs		$ 384	$ 11,138				$ 2			$ 384	$ 11,136
Issuance of common stock upon offering, net of issuance costs, shares						126,266	14,027,665
Issuance of common stock from restricted stock units					130,164
Issuance costs related to common stock	(491)	$ (12)
Net loss	(19,278)												(19,278)
Ending balance at Sep. 30, 2022	$ 38,929				$ 4				$ 398,253				$ (359,328)
Ending balance, shares at Sep. 30, 2022					36,829,626