Statements of Convertible Preferred Stock/Units and Stockholders'/Members' Equity (Deficit) - USD ($) $ in Thousands	Total	IPO	Preferred Units	Common Units	Predecessor's Deficit	Convertible Preferred Stock	Common Stock	Common Stock IPO	Additional Paid-in Capital	Additional Paid-in Capital IPO	Accumulated Other Comprehensive Loss	Accumulated Deficit
Preferred Units, balance, Units at Dec. 31, 2017			12,459,000
Preferred Units, balance at Dec. 31, 2017			$ 32,693
Members' equity, balance, Units at Dec. 31, 2017				2,531,000
Members' equity, balance at Dec. 31, 2017				$ 267
Balance at Dec. 31, 2017	$ (30,072)				$ (30,339)
Issuance of common units upon exercise of unit options	67			$ 67
Issuance of common units upon exercise of unit options, Units				311,000
Reclassification of warrant liability to equity due to adjustment from preferred stock warrant to common stock warrant upon completion of initial public offering	0
Vesting of early exercise options	32			$ 32
Stock-based compensation	60			$ 60
Net loss	(11,216)				(11,216)
Balance at Dec. 31, 2018	(41,129)				(41,555)
Preferred Units, balance, Units at Dec. 31, 2018			12,459,000
Preferred Units, balance at Dec. 31, 2018			$ 32,693
Members' equity, balance, Units at Dec. 31, 2018				2,842,000
Members' equity, balance at Dec. 31, 2018				$ 426
Distribution to members			$ (106)
Issuance of common units upon exercise of unit options	38			$ 38
Issuance of common units upon exercise of unit options, Units				78,000
Net loss to date of conversion	(2,549)				(2,549)
Conversion from LLC to C corporation				$ (481)	$ 44,104				$ (43,623)
Conversion from LLC to C corporation, Temporary equity, Shares			(12,459,000)			12,459,000
Conversion from LLC to C corporation, Temporary equity			$ (32,587)			$ 32,587
Conversion from LLC to C corporation, Shares				(2,920,000)			2,920,000
Issuance of Series C convertible preferred stock, net of issuance costs						$ 72,623
Issuance of Series C convertible preferred stock, net of issuance costs, Shares						17,915,000
Issuance of Series C convertible preferred stock upon conversion of convertible notes						$ 29,510
Issuance of Series C convertible preferred stock upon conversion of convertible notes, Shares						6,893,000
Reclassification of warrant liability to equity due to adjustment from preferred stock warrant to common stock warrant upon completion of initial public offering	0
Issuance of common stock upon exercise of stock options, net of repurchases	26								26
Issuance of common stock upon exercise of stock options, net of repurchases, Shares							69,000
Vesting of early exercise options	36								36
Stock-based compensation	17			$ 17
Stock-based compensation	389								389
Net loss	(24,734)
Net loss	$ (22,185)											$ (22,185)
Temporary equity, balance, Shares at Dec. 31, 2019	37,267,000					37,267,000
Temporary equity, balance at Dec. 31, 2019	$ 134,720					$ 134,720
Balance, Shares at Dec. 31, 2019							2,989,000
Balance at Dec. 31, 2019	(65,357)								(43,172)			(22,185)
Issuance of Series C convertible preferred stock, net of issuance costs						$ 2,200
Issuance of Series C convertible preferred stock, net of issuance costs, Shares						538,000
Issuance of stock, net of issuance costs, Value		$ 274,054						$ 2		$ 274,052
Issuance of stock, net of issuance costs, Shares								16,560,000
Conversion of convertible preferred stock into common stock upon completion of initial public offering	136,920					$ (136,920)	$ 2		136,918
Conversion of convertible preferred stock into common stock upon completion of initial public offering, Shares						(37,805,000)	17,921,000
Reclassification of warrant liability to equity due to adjustment from preferred stock warrant to common stock warrant upon completion of initial public offering	120								120
Cashless exercise of common stock warrants, Shares							16,000
Issuance of common stock upon exercise of stock options, net of repurchases	22								22
Issuance of common stock upon exercise of stock options, net of repurchases, Shares							54,000
Issuance of common stock under employee stock purchase plan	444								444
Issuance of common stock under employee stock purchase plan, Shares							29,000
Vesting of early exercise options	70								70
Stock-based compensation	4,310								4,310
Net loss	(44,355)											(44,355)
Other comprehensive loss	$ (5)										$ (5)
Temporary equity, balance, Shares at Dec. 31, 2020	0
Balance, Shares at Dec. 31, 2020							37,569,000
Balance at Dec. 31, 2020	$ 306,223						$ 4		$ 372,764		$ (5)	$ (66,540)