Condensed Consolidated Statement of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2020	$ 174,750	$ 91	$ 723,482	$ (548,776)	$ (47)
Beginning balance, shares at Dec. 31, 2020		91,459,239
Issuance of common stock upon exercise of stock options, value	372	$ 1	371
Issuance of common stock upon exercise of stock options, shares		104,184
Issuance of common stock upon vesting of RSUs, net of tax withholdings, shares		650
Issuance of common stock under ESPP, value	392		392
Issuance of common stock under ESPP, shares		24,191
Stock-based compensation expense	3,624		3,624
Other comprehensive income loss	32				32
Net loss	(35,465)			(35,465)
Ending balance at Mar. 31, 2021	143,705	$ 92	727,869	(584,241)	(15)
Ending balance, shares at Mar. 31, 2021		91,588,264
Beginning balance at Dec. 31, 2020	174,750	$ 91	723,482	(548,776)	(47)
Beginning balance, shares at Dec. 31, 2020		91,459,239
Net loss	(83,795)
Ending balance at Jun. 30, 2021	101,066	$ 92	733,533	(632,571)	12
Ending balance, shares at Jun. 30, 2021		91,713,810
Beginning balance at Mar. 31, 2021	143,705	$ 92	727,869	(584,241)	(15)
Beginning balance, shares at Mar. 31, 2021		91,588,264
Issuance of common stock upon exercise of stock options, value	586		586
Issuance of common stock upon exercise of stock options, shares		125,546
Stock-based compensation expense	5,078		5,078
Other comprehensive income loss	27				27
Net loss	(48,330)			(48,330)
Ending balance at Jun. 30, 2021	101,066	$ 92	733,533	(632,571)	12
Ending balance, shares at Jun. 30, 2021		91,713,810
Beginning balance at Dec. 31, 2021	$ 131,507	$ 92	745,829	(614,354)	(60)
Beginning balance, shares at Dec. 31, 2021	91,889,418	91,889,418
Issuance of common stock upon exercise of stock options, value	$ 257		257
Issuance of common stock upon exercise of stock options, shares		92,478
Issuance of common stock upon vesting of RSUs, net of tax withholdings, shares		69,195
Issuance of common stock under ESPP, value	892		892
Issuance of common stock under ESPP, shares		159,214
Stock-based compensation expense	5,079		5,079
Other comprehensive income loss	(155)				(155)
Net loss	(56,624)			(56,624)
Ending balance at Mar. 31, 2022	80,956	$ 92	752,057	(670,978)	(215)
Ending balance, shares at Mar. 31, 2022		92,210,305
Beginning balance at Dec. 31, 2021	$ 131,507	$ 92	745,829	(614,354)	(60)
Beginning balance, shares at Dec. 31, 2021	91,889,418	91,889,418
Issuance of common stock upon exercise of stock options, shares	131,686
Net loss	$ (121,359)
Ending balance at Jun. 30, 2022	$ 23,058	$ 92	758,935	(735,713)	(256)
Ending balance, shares at Jun. 30, 2022	92,306,944	92,306,944
Beginning balance at Mar. 31, 2022	$ 80,956	$ 92	752,057	(670,978)	(215)
Beginning balance, shares at Mar. 31, 2022		92,210,305
Issuance of common stock upon exercise of stock options, value	130		130
Issuance of common stock upon exercise of stock options, shares		39,208
Issuance of common stock upon vesting of RSUs, net of tax withholdings, shares		57,431
Stock-based compensation expense	6,748		6,748
Other comprehensive income loss	(41)				(41)
Net loss	(64,735)			(64,735)
Ending balance at Jun. 30, 2022	$ 23,058	$ 92	$ 758,935	$ (735,713)	$ (256)
Ending balance, shares at Jun. 30, 2022	92,306,944	92,306,944