Condensed Statements of Changes in Stockholders Equity - USD ($) $ in Thousands	Common stock.	Additional paid-in capital	Accumulated deficit	Total
Balance at Dec. 31, 2020	$ 1	$ 95,738	$ (54,394)	$ 41,345
Balance (shares) at Dec. 31, 2020	10,634,245
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		325		325
Exercise of common stock warrants		105		105
Exercise of common stock warrants (shares)	11,666
Exercise of stock options		6		6
Exercise of stock options (shares)	14,270
Net loss			(3,898)	(3,898)
Balance at Mar. 31, 2021	$ 1	96,174	(58,292)	37,883
Balance (shares) at Mar. 31, 2021	10,660,181
Balance at Dec. 31, 2021	$ 1	127,289	(79,105)	48,185
Balance (shares) at Dec. 31, 2021	12,110,373
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		1,310		1,310
Exercise of stock options		32		32
Exercise of stock options (shares)	17,012
Net loss			(11,653)	(11,653)
Balance at Mar. 31, 2022	$ 1	$ 128,631	$ (90,758)	$ 37,874
Balance (shares) at Mar. 31, 2022	12,127,385