STATEMENTS OF CHANGES IN CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (PARENTHETICAL) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Sale of common stock, offering costs	$ 739	$ 2,538
Series B Convertible Preferred Stock
Sale of common stock, offering costs		58
Series C Convertible Preferred Stock
Sale of common stock, offering costs		$ 174