CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Series A Preferred Stock Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Total
Balance at Dec. 31, 2020	$ 4,469	$ 37	$ 444,622		$ (311,929)	$ 137,199
Balance (in shares) at Dec. 31, 2020	4,753	36,578,460
Balance (in shares) at Dec. 31, 2020				7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			5,035			5,035
Exercise of stock options			244			244
Exercise of stock options (in shares)		55,030
Financing costs			(3)			(3)
Net loss					(27,141)	(27,141)
Balance at Mar. 31, 2021	$ 4,469	$ 37	449,898		(339,070)	115,334
Balance (in shares) at Mar. 31, 2021	4,753	36,633,490
Balance (in shares) at Mar. 31, 2021				7,307
Balance at Dec. 31, 2020	$ 4,469	$ 37	444,622		(311,929)	137,199
Balance (in shares) at Dec. 31, 2020	4,753	36,578,460
Balance (in shares) at Dec. 31, 2020				7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Net loss						(50,964)
Balance at Jun. 30, 2021	$ 4,302	$ 37	453,613		(362,893)	95,059
Balance (in shares) at Jun. 30, 2021	4,575	36,732,402
Balance (in shares) at Jun. 30, 2021				7,307
Balance at Mar. 31, 2021	$ 4,469	$ 37	449,898		(339,070)	115,334
Balance (in shares) at Mar. 31, 2021	4,753	36,633,490
Balance (in shares) at Mar. 31, 2021				7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			2,991			2,991
Exercise of stock options			557			557
Exercise of stock options (in shares)		63,312
Conversion of convertible preferred stock to common stock	$ (167)		167
Conversion of convertible preferred stock to common stock (in shares)	(178)	35,600
Net loss					(23,823)	(23,823)
Balance at Jun. 30, 2021	$ 4,302	$ 37	453,613		(362,893)	95,059
Balance (in shares) at Jun. 30, 2021	4,575	36,732,402
Balance (in shares) at Jun. 30, 2021				7,307
Balance at Dec. 31, 2021	$ 4,302	$ 37	459,852		(410,705)	$ 53,486
Balance (in shares) at Dec. 31, 2021	4,575	36,790,254
Balance (in shares) at Dec. 31, 2021				7,307		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			3,379			$ 3,379
Exercise of stock options			1,733			1,733
Exercise of stock options (in shares)		225,165
Issuance of common stock			1,168			1,168
Issuance of common stock (in shares)		123,255
Net loss					(19,361)	(19,361)
Balance at Mar. 31, 2022	$ 4,302	$ 37	466,132		(430,066)	40,405
Balance (in shares) at Mar. 31, 2022	4,575	37,138,674
Balance (in shares) at Mar. 31, 2022				7,307
Balance at Dec. 31, 2021	$ 4,302	$ 37	459,852		(410,705)	$ 53,486
Balance (in shares) at Dec. 31, 2021	4,575	36,790,254
Balance (in shares) at Dec. 31, 2021				7,307		7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Net loss						$ (58,794)
Balance at Jun. 30, 2022	$ 4,043	$ 37	470,222		(469,499)	$ 4,803
Balance (in shares) at Jun. 30, 2022	4,300	37,199,150
Balance (in shares) at Jun. 30, 2022				7,307		7,307
Balance at Mar. 31, 2022	$ 4,302	$ 37	466,132		(430,066)	$ 40,405
Balance (in shares) at Mar. 31, 2022	4,575	37,138,674
Balance (in shares) at Mar. 31, 2022				7,307
Increase (Decrease) in Stockholders' Equity (Deficit)
Stock-based compensation expense			3,817			3,817
Issuance of common stock (vesting of restricted shares), shares		2,508
Exercise of stock options			14			14
Exercise of stock options (in shares)		2,968
Conversion of convertible preferred stock to common stock	$ (259)		259
Conversion of convertible preferred stock to common stock (in shares)	(275)	55,000
Net loss					(39,433)	(39,433)
Balance at Jun. 30, 2022	$ 4,043	$ 37	$ 470,222		$ (469,499)	$ 4,803
Balance (in shares) at Jun. 30, 2022	4,300	37,199,150
Balance (in shares) at Jun. 30, 2022				7,307		7,307