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		$ (60,841)
Balance, Shares at Dec. 31, 2020		23,260,399
Exercise of stock options	63		63
Exercise of stock options, Shares		41,473
Stock-based compensation	1,120		1,120
Unrealized loss on available for sale securities
Net loss	(9,887)				(9,887)
Balance at Mar. 31, 2021	140,723	$ 2	211,449		(70,728)
Balance, Shares at Mar. 31, 2021		23,301,872
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
Stock-based compensation	1,141		1,141
Unrealized loss on available for sale securities	(509)			(509)
Net loss	(11,762)				(11,762)
Balance at Mar. 31, 2022	$ 100,243	$ 3	$ 215,828	$ (693)	$ (114,895)
Balance, Shares at Mar. 31, 2022	23,492,873	23,492,873