Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Balance at Dec. 31, 2020	$ 112,951	$ 49	$ 195,699	$ (82,797)
Balance (in shares) at Dec. 31, 2020		48,802
Exercise of stock options for cash	414		414
Exercise of stock options for cash (in shares)		106
Exercise of warrants for cash	105		105
Exercise of warrants for cash (in shares)		18
Cashless exercise of warrants		459
Vesting related to unvested share liability	5		5
Stock-based compensation	2,674		2,674
Net loss	(13,630)			(13,630)
Balance at Jun. 30, 2021	102,519	$ 49	198,897	(96,427)
Balance (in shares) at Jun. 30, 2021		49,385
Balance at Mar. 31, 2021	108,303	$ 49	196,999	(88,745)
Balance (in shares) at Mar. 31, 2021		49,366
Exercise of stock options for cash	56		56
Exercise of stock options for cash (in shares)		18
Exercise of warrants for cash	4		4
Exercise of warrants for cash (in shares)		1
Vesting related to unvested share liability	2		2
Stock-based compensation	1,836		1,836
Net loss	(7,682)			(7,682)
Balance at Jun. 30, 2021	102,519	$ 49	198,897	(96,427)
Balance (in shares) at Jun. 30, 2021		49,385
Balance at Dec. 31, 2021	$ 88,120	$ 49	202,201	(114,130)
Balance (in shares) at Dec. 31, 2021	49,429	49,429
Issuance of common stock, net of issuance cost of $146	$ 3,871	$ 3	3,868
Issuance of common stock, net of issuance cost (in shares)		2,721
Stock-based compensation	3,655		3,655
Net loss	(21,645)			(21,645)
Balance at Jun. 30, 2022	$ 74,001	$ 52	209,724	(135,775)
Balance (in shares) at Jun. 30, 2022	52,150	52,150
Balance at Mar. 31, 2022	$ 80,194	$ 49	204,179	(124,034)
Balance (in shares) at Mar. 31, 2022		49,429
Issuance of common stock, net of issuance cost of $146	3,871	$ 3	3,868
Issuance of common stock, net of issuance cost (in shares)		2,721
Stock-based compensation	1,677		1,677
Net loss	(11,741)			(11,741)
Balance at Jun. 30, 2022	$ 74,001	$ 52	$ 209,724	$ (135,775)
Balance (in shares) at Jun. 30, 2022	52,150	52,150