Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]
Beginning Balance at Dec. 31, 2021	$ 143,203		$ 150,741	$ (7,538)
Beginning Balance (in shares) at Dec. 31, 2021		28,012,017
Stock-based compensation	787		787
Issuance of common stock upon exercise of stock options	55		55
Issuance of common stock upon exercise of stock options, shares		30,462
Net loss	(5,497)			(5,497)
Ending Balance at Mar. 31, 2022	138,548		151,583	(13,035)
Ending Balance (in shares) at Mar. 31, 2022		28,042,479
Beginning Balance at Dec. 31, 2022	$ 99,885		154,891	(55,006)
Beginning Balance (in shares) at Dec. 31, 2022	28,179,423	28,179,423
Stock-based compensation	$ 1,010		1,010
Issuance of common stock upon exercise of stock options	9		9
Issuance of common stock upon exercise of stock options, shares		10,769
Net loss	(8,817)			(8,817)
Ending Balance at Mar. 31, 2023	$ 92,087		$ 155,910	$ 63,823
Ending Balance (in shares) at Mar. 31, 2023	28,190,192	28,190,192