Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid- In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 610,905	$ 7	$ 913,354	$ 46	$ (302,502)
Beginning balance (in shares) at Dec. 31, 2020		66,194
Share-based compensation expense	5,075		5,075
Issuance of common stock under equity incentive plan	829		829
Issuance of common stock under equity incentive plan (in shares)		69
Other comprehensive income (loss)	(128)			(128)
Net loss	(30,694)				(30,694)
Ending balance at Mar. 31, 2021	585,987	$ 7	919,258	(82)	(333,196)
Ending balance (in shares) at Mar. 31, 2021		66,263
Beginning balance at Dec. 31, 2021	506,609	$ 7	941,359	(1,789)	(432,968)
Beginning balance (in shares) at Dec. 31, 2021		66,572
Share-based compensation expense	6,650		6,650
Issuance of common stock under equity incentive plan	303		303
Issuance of common stock under equity incentive plan (in shares)		64
Other comprehensive income (loss)	(4,859)			(4,859)
Net loss	(32,453)				(32,453)
Ending balance at Mar. 31, 2022	$ 476,250	$ 7	$ 948,312	$ (6,648)	$ (465,421)
Ending balance (in shares) at Mar. 31, 2022		66,636