Statements of stockholders' equity - USD ($) $ in Thousands	Total	Series 1 Convertible Preferred Stock	Preferred Stock Series 1 Convertible Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Balance at Dec. 31, 2021	$ 233,977		$ 3	$ 0	$ 598,916	$ (364,942)
Balance, Shares at Dec. 31, 2021			29,863,674
Balance, Shares at Dec. 31, 2021				1,785,476
Stock Issued During Period, Value, Employee Benefit Plan	98				98
Stock Issued During Period, Shares, Employee Benefit Plan				8,199
Issuance of Common Stock pursuant to employee stock purchase plan	308				308
Issuance of Common Stock pursuant to employee stock purchase plan, Shares				17,721,000
Stock-based compensation expense	5,368				5,368
Net Income (Loss)	(113,012)					(113,012)
Balance at Dec. 31, 2022	$ 126,739		$ 3	$ 0	604,690	(477,954)
Balance, Shares at Dec. 31, 2022		29,863,674	29,863,674
Balance, Shares at Dec. 31, 2022	1,811,396			1,811,396
Stock Issued During Period, Shares, Employee Benefit Plan				6,030
Issuance of Common Stock pursuant to employee stock purchase plan	$ 33			$ 4,560	33
Stock-based compensation expense	4,351				4,351
Net Income (Loss)	(62,007)					(62,007)
Balance at Dec. 31, 2023	$ 69,116		$ 3	$ 0	$ 609,074	$ (539,961)
Balance, Shares at Dec. 31, 2023		29,863,674	29,863,674
Balance, Shares at Dec. 31, 2023	1,821,986			1,821,986