Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total	IPO	Follow On Offering	Convertible Preferred Stock Preferred Class A	Class A and Class B Common Stock	Class A and Class B Common Stock IPO	Class A and Class B Common Stock Follow On Offering	Additional Paid in Capital	Additional Paid in Capital IPO	Additional Paid in Capital Follow On Offering	Accumulated Deficit	Accumulated Other Comprehensive Income
Beginning balance at Dec. 31, 2019	$ 87,679			$ 107,953	$ 0			$ 2,288			$ (22,586)	$ 24
Beginning balance (in shares) at Dec. 31, 2019				22,173,216	12,193,677
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock (in shares)						40,207
Issuance of Class A common stock		$ 24							$ 24
Vesting of early exercised stock options and restricted common stock	4							4
Stock-based compensation	579							579
Other comprehensive income	533											533
Net loss	(5,493)										(5,493)
Ending balance at Mar. 31, 2020	83,326			$ 107,953	$ 0			2,895			(28,079)	557
Ending balance (in shares) at Mar. 31, 2020				22,173,216	12,233,884
Beginning balance at Dec. 31, 2020	$ 431,609			$ 0	$ 1			486,915			(55,361)	54
Beginning balance (in shares) at Dec. 31, 2020	59,261,051			0	59,261,051
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock (in shares)						399,174	1,650,000
Issuance of Class A common stock		$ 171	$ 102,959						$ 171	$ 102,959
Repurchase of Class A common stock (in shares)					(876)
Repurchase of Class A common stock	$ 0
Vesting of early exercised stock options and restricted common stock	44							44
Return of profit	11,403							11,403
Stock-based compensation	6,039							6,039
Other comprehensive income	(26)											(26)
Net loss	(16,429)										(16,429)
Ending balance at Mar. 31, 2021	$ 535,770			$ 0	$ 1			$ 607,531			$ (71,790)	$ 28
Ending balance (in shares) at Mar. 31, 2021	61,309,349			0	61,309,349