STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		18,410,458
Beginning balance at Dec. 31, 2020	$ 22,211	$ 18	$ 141,612	$ (119,419)
Stock-based compensation	3,068		3,068
Exercise of stock options, net of cashless exercise of 58,926 shares and 92,634 shares withheld (in shares)		208,741
Exercise of stock options, net of cashless exercise of 58,926 shares and 92,634 shares withheld	1,757	$ 1	1,756
Issuance of shares for vested restricted stock grants (in shares)		32,170
Exercise of warrants (in shares)		9,000
Exercise of warrants	19		19
Net loss	(7,478)			(7,478)
Ending balance (in shares) at Dec. 31, 2021		18,660,369
Ending balance at Dec. 31, 2021	19,577	$ 19	146,455	(126,897)
Stock-based compensation	2,778		2,778
Issuance of shares for vested restricted stock grants (in shares)		296,997
Net loss	(3,851)			(3,851)
Ending balance (in shares) at Dec. 31, 2022		18,957,366
Ending balance at Dec. 31, 2022	$ 18,504	$ 19	$ 149,233	$ (130,748)