CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Series A-1 Redeemable Convertible Preferred Stock	Series A-2 Redeemable Convertible Preferred Stock	Series B Redeemable Convertible Preferred Stock
Beginning Balance at Dec. 31, 2019	$ (17,429)		$ 458	$ (17,887)
Beginning Balance, Shares at Dec. 31, 2019		119,936
Beginning Balance at Dec. 31, 2019					$ 2	$ 25,067
Beginning Balance, Shares at Dec. 31, 2019					20,000,000	62,819,866
Issuance of redeemable convertible preferred stock						$ 17,719
Issuance of redeemable convertible preferred stock, Shares						44,375,000
Issuance of common stock upon exercise of stock options	43		43
Issuance of common stock upon exercise of stock options, Shares		31,384
Stock-based compensation expense	112		112
Net loss	(7,849)			(7,849)
Ending Balance at Mar. 31, 2020					$ 2	$ 42,786
Ending Balance, Shares at Mar. 31, 2020					20,000,000	107,194,866
Ending Balance at Mar. 31, 2020	(25,123)		613	(25,736)
Ending Balance, Shares at Mar. 31, 2020		151,320
Beginning Balance at Dec. 31, 2020	$ (59,065)	$ 1	2,158	(61,224)
Beginning Balance, Shares at Dec. 31, 2020	505,074	505,074
Beginning Balance at Dec. 31, 2020	$ 107,336				$ 2	$ 42,786	$ 64,548
Beginning Balance, Shares at Dec. 31, 2020	251,714,086				20,000,000	107,194,866	124,519,220
Issuance of redeemable convertible preferred stock							$ 45,375
Issuance of redeemable convertible preferred stock, Shares							87,259,605
Conversion of redeemable convertible preferred stock into common stock upon closing of initial public offering					$ (2)	$ (42,786)	$ (109,923)
Conversion of redeemable convertible preferred stock into common stock upon closing of initial public offering, Shares					(20,000,000)	(107,194,866)	(211,778,825)
Conversion of redeemable convertible preferred stock into common stock upon closing of initial public offering	$ 152,711	$ 2	152,709
Conversion of redeemable convertible preferred stock into common stock upon closing of initial public offering, Shares		24,924,501
Issuance of common shares upon closing of initial public offering, net of offering costs and underwriter fees of $17,132	186,308	$ 1	186,307
Issuance of common shares upon closing of initial public offering, net of offering costs and underwriter fees, Shares		11,302,219
Issuance of common stock upon exercise of stock options	$ 65		65
Issuance of common stock upon exercise of stock options, Shares	38,216	38,216
Stock-based compensation expense	$ 891		891
Net loss	(13,723)			(13,723)
Ending Balance, Shares at Mar. 31, 2021					0	0	0
Ending Balance at Mar. 31, 2021	$ 267,187	$ 4	$ 342,130	$ (74,947)
Ending Balance, Shares at Mar. 31, 2021	36,770,010	36,770,010