CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Equity Method Investee	Follow-on Offering [Member]	Common Stock	Common Stock Follow-on Offering [Member]	Additional Paid-in Capital	Additional Paid-in Capital Equity Method Investee	Additional Paid-in Capital Follow-on Offering [Member]	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 in follow-on offering, net of discounts and issuance costs	1,454					1,454
Vesting of common stock from option exercises	4					4
Vesting of common stock from option exercises, Shares				1,011
Issuance of common stock from option exercises	143					143
Issuance of common stock from option exercises, Shares				55,277
Issuance of common stock pursuant to employee stock purchase plan	446					446
Issuance of common stock pursuant to employee stock purchase plan, Shares				48,792
Issuance of common stock, net of discounts and issuance costs	1,454					1,454
Issuance of common stock, net of discounts and issuance costs, Share				114,914
Stock-based compensation	3,883					3,883
Other comprehensive gain (loss)	(23)								$ (23)
Net income (loss)	(1,073)									(1,073)
Ending balance at Mar. 31, 2021	200,829			$ 5		530,288			(23)	(329,441)
Ending balance, Shares at Mar. 31, 2021				50,485,569
Beginning balance at Dec. 31, 2020	195,995			$ 5		524,358				(328,368)
Beginning balance, Shares at Dec. 31, 2020				50,265,575
Other comprehensive gain (loss)	(5)
Net income (loss)	(62,181)
Ending balance at Sep. 30, 2021	198,571			$ 6		589,119			(5)	(390,549)
Ending balance, Shares at Sep. 30, 2021				57,149,978
Beginning balance at Mar. 31, 2021	200,829			$ 5		530,288			(23)	(329,441)
Beginning balance, Shares at Mar. 31, 2021				50,485,569
Issuance of common stock in follow-on offering, net of discounts and issuance costs			$ 49,744		$ 1			$ 49,743
Vesting of common stock from option exercises	4					4
Vesting of common stock from option exercises, Shares				1,011
Issuance of common stock from option exercises	2					2
Issuance of common stock from option exercises, Shares				4,071
Issuance of common stock, net of discounts and issuance costs			$ 49,744		$ 1			$ 49,743
Issuance of common stock, net of discounts and issuance costs, Share					6,596,306
Stock-based compensation	4,473					4,473
Other comprehensive gain (loss)	25								25
Net income (loss)	(30,500)									(30,500)
Ending balance at Jun. 30, 2021	224,577			$ 6		584,510			2	(359,941)
Ending balance, Shares at Jun. 30, 2021				57,086,957
Vesting of common stock from option exercises	3					3
Vesting of common stock from option exercises, Shares				773
Issuance of common stock from option exercises, Shares				117
Issuance of common stock pursuant to employee stock purchase plan	380					380
Issuance of common stock pursuant to employee stock purchase plan, Shares				62,131
Stock-based compensation	4,226					4,226
Other comprehensive gain (loss)	(7)								(7)
Net income (loss)	(30,608)									(30,608)
Ending balance at Sep. 30, 2021	198,571			$ 6		589,119			(5)	(390,549)
Ending balance, Shares at Sep. 30, 2021				57,149,978
Beginning balance at Dec. 31, 2021	169,651			$ 6		593,784			(7)	(424,132)
Beginning balance, Shares at Dec. 31, 2021				57,150,274
Issuance of common stock from RSU vesting				87,140
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	439					439
Issuance of common stock pursuant to employee stock purchase plan, Shares				147,871
Stock-based compensation	4,051					4,051
Other comprehensive gain (loss)	7								7
Net income (loss)	92,105									92,105
Ending balance at Mar. 31, 2022	266,254			$ 6		598,275				(332,027)
Ending balance, Shares at Mar. 31, 2022				57,385,578
Beginning balance at Dec. 31, 2021	169,651			$ 6		593,784			(7)	(424,132)
Beginning balance, Shares at Dec. 31, 2021				57,150,274
Other comprehensive gain (loss)	(450)
Net income (loss)	29,290
Ending balance at Sep. 30, 2022	209,061			$ 6		604,354			(457)	(394,842)
Ending balance, Shares at Sep. 30, 2022				57,480,610
Beginning balance at Mar. 31, 2022	266,254			$ 6		598,275				(332,027)
Beginning balance, Shares at Mar. 31, 2022				57,385,578
Stock-based compensation	3,143	$ 21				3,143	$ 21
Other comprehensive gain (loss)	(41)								(41)
Net income (loss)	(29,089)									(29,089)
Ending balance at Jun. 30, 2022	240,288			$ 6		601,439			(41)	(361,116)
Ending balance, Shares at Jun. 30, 2022				57,385,578
Issuance of common stock from RSU vesting				16,450
Issuance of common stock pursuant to employee stock purchase plan	124					124
Issuance of common stock pursuant to employee stock purchase plan, Shares				78,582
Stock-based compensation	2,771	$ 20				2,771	$ 20
Other comprehensive gain (loss)	(416)								(416)
Net income (loss)	(33,726)									(33,726)
Ending balance at Sep. 30, 2022	$ 209,061			$ 6		$ 604,354			$ (457)	$ (394,842)
Ending balance, Shares at Sep. 30, 2022				57,480,610