CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2020	$ 149,427	$ 2	$ 210,266	$ 0	$ (60,841)
Balance, Shares at Dec. 31, 2020		23,260,399
Exercise of stock options	143	$ 1	142
Exercise of stock options, Shares		99,544
Issuance of common stock related to employee stock purchase plan	96		96
Issuance of common stock related to employee stock purchase plan, Shares		10,127
Stock-based compensation	2,130		2,130
Unrealized loss on available for sale securities	(29)			(29)
Net loss	(21,661)				(21,661)
Balance at Jun. 30, 2021	130,106	$ 3	212,634	(29)	(82,502)
Balance, Shares at Jun. 30, 2021		23,370,070
Balance at Mar. 31, 2021	140,723	$ 2	211,449	0	(70,728)
Balance, Shares at Mar. 31, 2021		23,301,872
Exercise of stock options	80	$ 1	79
Exercise of stock options, Shares		58,071
Issuance of common stock related to employee stock purchase plan	96		96
Issuance of common stock related to employee stock purchase plan, Shares		10,127
Stock-based compensation	1,010		1,010
Unrealized loss on available for sale securities	(29)			(29)
Net loss	(11,774)				(11,774)
Balance at Jun. 30, 2021	130,106	$ 3	212,634	(29)	(82,502)
Balance, Shares at Jun. 30, 2021		23,370,070
Balance at Dec. 31, 2021	$ 111,371	$ 3	214,685	(184)	(103,133)
Balance, Shares at Dec. 31, 2021	23,491,881	23,491,881
Exercise of stock options	$ 2		2
Exercise of stock options, Shares		992
Issuance of common stock related to employee stock purchase plan	38		38
Issuance of common stock related to employee stock purchase plan, Shares		25,545
Issuance of common stock related to vesting of restricted stock units, net of tax withholdings	(40)		(40)
Issuance of common stock related to vesting of restricted stock units, net of tax withholdings, shares		41,832
Stock-based compensation	2,046		2,046
Unrealized loss on available for sale securities	(661)			(661)
Net loss	(23,635)				(23,635)
Balance at Jun. 30, 2022	$ 89,121	$ 3	216,731	(845)	(126,768)
Balance, Shares at Jun. 30, 2022	23,560,250	23,560,250
Balance at Mar. 31, 2022	$ 100,243	$ 3	215,828	(693)	(114,895)
Balance, Shares at Mar. 31, 2022		23,492,873
Issuance of common stock related to employee stock purchase plan	38		38
Issuance of common stock related to employee stock purchase plan, Shares		25,545
Issuance of common stock related to vesting of restricted stock units, net of tax withholdings	(40)		(40)
Issuance of common stock related to vesting of restricted stock units, net of tax withholdings, shares		41,832
Stock-based compensation	905		905
Unrealized loss on available for sale securities	(152)			(152)
Net loss	(11,872)				(11,872)
Balance at Jun. 30, 2022	$ 89,121	$ 3	$ 216,731	$ (845)	$ (126,768)
Balance, Shares at Jun. 30, 2022	23,560,250	23,560,250