CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Subscription Receivable [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]
Beginning Balance at Dec. 31, 2020	$ 32,986	$ 3	$ 136,868		$ (103,886)		$ 1
Beginning Balance (shares) at Dec. 31, 2020		25,546,257				105,144
Stock-based compensation	1,403		1,403
Issuance of common stock, net of issuance costs	28,115		28,115
Issuance of common stock, net of issuance costs (shares)		2,033,899
Exercise of stock options	240		240
Exercise of stock options (shares)		15,708
Net loss	(936)				(936)
Unrealized gain (loss) on marketable securities	2						2
Ending Balance at Mar. 31, 2021	61,810	$ 3	166,626		(104,822)		3
Ending Balance (shares) at Mar. 31, 2021		27,595,864				105,144
Beginning Balance at Dec. 31, 2020	32,986	$ 3	136,868		(103,886)		1
Beginning Balance (shares) at Dec. 31, 2020		25,546,257				105,144
Net loss	(12,711)
Unrealized gain (loss) on marketable securities	(2)
Ending Balance at Jun. 30, 2021	52,156	$ 3	168,751		(116,597)		(1)
Ending Balance (shares) at Jun. 30, 2021		27,619,864				105,144
Beginning Balance at Mar. 31, 2021	61,810	$ 3	166,626		(104,822)		3
Beginning Balance (shares) at Mar. 31, 2021		27,595,864				105,144
Stock-based compensation	1,848		1,848
Exercise of stock options	277		277
Exercise of stock options (shares)		24,000
Net loss	(11,775)				(11,775)
Unrealized gain (loss) on marketable securities	(4)						(4)
Ending Balance at Jun. 30, 2021	52,156	$ 3	168,751		(116,597)		(1)
Ending Balance (shares) at Jun. 30, 2021		27,619,864				105,144
Beginning Balance at Dec. 31, 2021	32,605	$ 3	171,597		(138,966)		(29)
Beginning Balance (shares) at Dec. 31, 2021		27,624,197				105,144
Stock-based compensation	1,316		1,316
Net loss	(8,470)				(8,470)
Unrealized gain (loss) on marketable securities	(33)						(33)
Ending Balance at Mar. 31, 2022	25,418	$ 3	172,913		(147,436)		(62)
Ending Balance (shares) at Mar. 31, 2022		27,624,197				105,144
Beginning Balance at Dec. 31, 2021	$ 32,605	$ 3	171,597		(138,966)		(29)
Beginning Balance (shares) at Dec. 31, 2021		27,624,197				105,144
Exercise of stock options (shares)	0
Net loss	$ (18,638)
Unrealized gain (loss) on marketable securities	(35)
Ending Balance at Jun. 30, 2022	16,333	$ 3	173,998	$ 0	(157,604)	$ 0	(64)
Ending Balance (shares) at Jun. 30, 2022		27,624,197				105,144
Beginning Balance at Mar. 31, 2022	25,418	$ 3	172,913		(147,436)		(62)
Beginning Balance (shares) at Mar. 31, 2022		27,624,197				105,144
Stock-based compensation	1,085		1,085
Net loss	(10,168)				(10,168)
Unrealized gain (loss) on marketable securities	(2)						(2)
Ending Balance at Jun. 30, 2022	$ 16,333	$ 3	$ 173,998	$ 0	$ (157,604)	$ 0	$ (64)
Ending Balance (shares) at Jun. 30, 2022		27,624,197				105,144