Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	ATM Offering Common stock	ATM Offering Additional paid-in capital	ATM Offering	Common stock	Additional paid-in capital	Accumulated deficit	Total
Stockholders' (deficit) equity beginning balance at Dec. 31, 2020				$ 633	$ 358,277	$ (213,001)	$ 145,909
Stockholders' (deficit) equity shares beginning balance at Dec. 31, 2020				63,257,000
Stockholders' (Deficit) Equity Rollforward
Issuance of common stock upon vesting of restricted stock				$ 11	(11)
Issuance of common stock upon vesting of restricted stock (in shares)				1,089,000
Repurchase of shares for tax withholdings				$ (3)	(909)		(912)
Repurchase of shares for tax withholdings (in shares)				(347,000)
Stock-based compensation					5,133		5,133
Issuance of common stock	$ 36	$ 14,502	$ 14,538
Issuance of common stock (in shares)	3,630,000		3,629,458
Issuance of common stock upon exercise of stock options					133		133
Issuance of common stock upon exercise of stock options (in shares)				87,000
Net loss						(34,045)	(34,045)
Stockholders' (deficit) equity ending balance at Jun. 30, 2021				$ 677	377,125	(247,046)	130,756
Stockholders' (deficit) equity shares ending balance at Jun. 30, 2021				67,716,000
Stockholders' (deficit) equity beginning balance at Mar. 31, 2021				$ 669	375,499	(227,227)	148,941
Stockholders' (deficit) equity shares beginning balance at Mar. 31, 2021				66,930,000
Stockholders' (Deficit) Equity Rollforward
Issuance of common stock upon vesting of restricted stock				$ 11	(11)
Issuance of common stock upon vesting of restricted stock (in shares)				1,084,000
Repurchase of shares for tax withholdings				$ (3)	(902)		(905)
Repurchase of shares for tax withholdings (in shares)				(345,000)
Stock-based compensation					2,478		2,478
Issuance of common stock upon exercise of stock options					61		61
Issuance of common stock upon exercise of stock options (in shares)				47,000
Net loss						(19,819)	(19,819)
Stockholders' (deficit) equity ending balance at Jun. 30, 2021				$ 677	377,125	(247,046)	130,756
Stockholders' (deficit) equity shares ending balance at Jun. 30, 2021				67,716,000
Stockholders' (deficit) equity beginning balance at Dec. 31, 2021				$ 677	381,966	(287,887)	$ 94,756
Stockholders' (deficit) equity shares beginning balance at Dec. 31, 2021				67,716,000			67,716,000
Stockholders' (Deficit) Equity Rollforward
Stock-based compensation					4,631		$ 4,631
Issuance of warrants in connection with term loan financing					206		206
Net loss						(37,494)	(37,494)
Stockholders' (deficit) equity ending balance at Jun. 30, 2022				$ 677	386,803	(325,381)	$ 62,099
Stockholders' (deficit) equity shares ending balance at Jun. 30, 2022				67,716,000			67,716,000
Stockholders' (deficit) equity beginning balance at Mar. 31, 2022				$ 677	384,522	(307,714)	$ 77,485
Stockholders' (deficit) equity shares beginning balance at Mar. 31, 2022				67,716,000
Stockholders' (Deficit) Equity Rollforward
Stock-based compensation					2,281		2,281
Net loss						(17,667)	(17,667)
Stockholders' (deficit) equity ending balance at Jun. 30, 2022				$ 677	$ 386,803	$ (325,381)	$ 62,099
Stockholders' (deficit) equity shares ending balance at Jun. 30, 2022				67,716,000			67,716,000