CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning Balance at Dec. 31, 2020	$ 67,210	$ 109	$ 125,094	$ (57,993)
Beginning Balance, Shares at Dec. 31, 2020		10,933
Stock-based compensation	2,301		2,301
Net loss	(5,182)			(5,182)
Ending Balance at Mar. 31, 2021	64,329	$ 109	127,395	(63,175)
Ending Balance, Shares at Mar. 31, 2021		10,933
Beginning Balance at Dec. 31, 2020	67,210	$ 109	125,094	(57,993)
Beginning Balance, Shares at Dec. 31, 2020		10,933
Net loss	(15,699)
Ending Balance at Sep. 30, 2021	57,046	$ 110	130,628	(73,692)
Ending Balance, Shares at Sep. 30, 2021		10,957
Beginning Balance at Mar. 31, 2021	64,329	$ 109	127,395	(63,175)
Beginning Balance, Shares at Mar. 31, 2021		10,933
Issuance of common stock under the 2020 ESPP	170	$ 1	169
Issuance of common stock under the 2020 ESPP, Shares		24
Stock-based compensation	1,491		1,491
Net loss	(4,362)			(4,362)
Ending Balance at Jun. 30, 2021	61,628	$ 110	129,055	(67,537)
Ending Balance, Shares at Jun. 30, 2021		10,957
Stock-based compensation	1,573		1,573
Net loss	(6,155)			(6,155)
Ending Balance at Sep. 30, 2021	57,046	$ 110	130,628	(73,692)
Ending Balance, Shares at Sep. 30, 2021		10,957
Beginning Balance at Dec. 31, 2021	54,879	$ 110	132,363	(77,594)
Beginning Balance, Shares at Dec. 31, 2021		10,990
Restricted stock awards cancelled		(5)
Stock-based compensation	1,607		1,607
Net loss	(6,674)			(6,674)
Ending Balance at Mar. 31, 2022	49,812	$ 110	133,970	(84,268)
Ending Balance, Shares at Mar. 31, 2022		10,985
Beginning Balance at Dec. 31, 2021	54,879	$ 110	132,363	(77,594)
Beginning Balance, Shares at Dec. 31, 2021		10,990
Net loss	(17,424)
Ending Balance at Sep. 30, 2022	42,583	$ 110	137,491	(95,018)
Ending Balance, Shares at Sep. 30, 2022		11,023
Beginning Balance at Mar. 31, 2022	49,812	$ 110	133,970	(84,268)
Beginning Balance, Shares at Mar. 31, 2022		10,985
Issuance of common stock under the 2020 ESPP	212		212
Issuance of common stock under the 2020 ESPP, Shares		37
Restricted stock awards cancelled		(1)
Stock-based compensation	1,637		1,637
Net loss	(6,759)			(6,759)
Ending Balance at Jun. 30, 2022	44,902	$ 110	135,819	(91,027)
Ending Balance, Shares at Jun. 30, 2022		11,021
Issuance of common stock under ATM offering, net of offering costs		2
Stock-based compensation	1,672		1,672
Net loss	(3,991)			(3,991)
Ending Balance at Sep. 30, 2022	$ 42,583	$ 110	$ 137,491	$ (95,018)
Ending Balance, Shares at Sep. 30, 2022		11,023