Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020	$ 334,622	$ 4	$ 463,436	$ (128,829)	$ 11
Beginning balance, Shares at Dec. 31, 2020		42,282
Issuance of common stock upon exercise of stock options and warrants	580		580
Issuance of common stock upon exercise of stock options and warrants, shares		100
Stock-based compensation expense	2,478		2,478
Other comprehensive loss	54				54
Net loss	(37,215)			(37,215)
Ending balance at Mar. 31, 2021	300,519	$ 4	466,494	(166,044)	65
Ending balance, Shares at Mar. 31, 2021		42,382
Beginning balance at Dec. 31, 2021	$ 453,643	$ 5	685,459	(231,766)	(55)
Beginning balance, Shares at Dec. 31, 2021	54,761	54,761
Issuance of common stock upon exercise of stock options and vesting of restricted stock units	$ 2,049	$ 1	2,048
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, shares		356
Stock-based compensation expense	4,269		4,269
Other comprehensive loss	(1,482)				(1,482)
Net loss	(31,684)			(31,684)
Ending balance at Mar. 31, 2022	$ 426,795	$ 6	$ 691,776	$ (263,450)	$ (1,537)
Ending balance, Shares at Mar. 31, 2022	55,117	55,117