Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Deficit Accumulated	Series A Preferred Stock	Series B Preferred Stock	Series B-1 Preferred Stock
Beginning balance (in shares) at Dec. 31, 2019		410,429			17,000,000	25,186,738	28,749,997
Beginning balance at Dec. 31, 2019	$ (50,364,000)	$ 1,000	$ 2,188,000	$ (52,553,000)	$ 16,982,000	$ 12,235,000	$ 22,755,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercised of stock options (in shares)	14,406	14,406
Exercised of stock options	$ 68,000		68,000
Vesting of early exercised stock options (in shares)		73,434
Vesting of early exercised stock options	258,000	$ 0	258,000
Issuance of common stock to Millendo shareholders (in shares)							43,749,996
Issuance of common stock to Millendo shareholders							$ 34,735,000
Share-based compensation	453,000		453,000
Net loss	(19,208,000)			(19,208,000)
Ending balance (in shares) at Dec. 31, 2020		498,269			17,000,000	25,186,738	72,499,993
Ending balance at Dec. 31, 2020	$ (68,793,000)	$ 1,000	2,967,000	(71,761,000)	$ 16,982,000	$ 12,235,000	$ 57,490,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercised of stock options (in shares)	33,127	33,127
Exercised of stock options	$ 139,000		139,000
Vesting of early exercised stock options (in shares)		28,196
Vesting of early exercised stock options	133,000		133,000
Conversion of preferred stock to common stock (in shares)		3,692,912			(17,000,000)	(25,186,738)	(72,499,993)
Conversion of preferred stock to common stock	86,707,000	$ 4,000	86,703,000		$ (16,982,000)	$ (12,235,000)	$ (57,490,000)
Issuance of common stock for cash, net of issuance cost (in shares)		1,388,374
Issuance of common stock for cash, net of issuance cost	33,474,000	$ 1,000	33,473,000
Reverse recapitalization transaction costs	(6,420,000)		(6,420,000)
Issuance of common stock to Millendo shareholders (in shares)		1,269,446
Issuance of common stock to Millendo shareholders	18,001,000	$ 1,000	18,000,000
Issuance of common stock warrants	73,000		73,000
Share-based compensation	1,105,000		1,105,000
Net loss	(28,302,000)			(28,302,000)
Ending balance (in shares) at Dec. 31, 2021		6,910,324
Ending balance at Dec. 31, 2021	$ 36,117,000	$ 7,000	$ 136,173,000	$ (100,063,000)