Consolidated Statements of Convertible Preferred Stock and Stockholders / Members Equity (Deficit) - USD ($) $ in Thousands	Total	Series D Convertible Preferred Stock	Class C Preferred Units	Class A Units	Class B Common Stock	Common Stock	Common Stock Class A Units	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest	Preferred Stock [Member] Class C Preferred Units
Balance at Dec. 31, 2018	$ (28,446)						$ 750		$ (118,560)	$ 19	$ 89,345
Balance, shares at Dec. 31, 2018				54,600,000							23,968,178
Noncontrolling interest	(5)									(5)
Warrants issued by affiliates in connection with modification of convertible promissory notes	764							$ 764
Assumption of unvested profits interest liability by affiliates	197							197
Assumption of vested profits interest liability by affiliates	800							800
Beneficial conversion feature in convertible promissory notes	534							534
Taxes related to net share settlement of equity awards	0
Net loss	(29,855)								(29,794)	(61)
Balance at Dec. 31, 2019	(56,011)						$ 750	2,295	(148,354)	(47)	$ 89,345
Balance, shares at Dec. 31, 2019				54,600,000							23,968,178
Noncontrolling interest	(19)
Issuance of Series D convertible preferred stock for cash, net of $4,317 of issuance costs		$ 68,183
Issuance of Series D convertible preferred stock for cash, net of $4,317 of issuance costs, shares		140,626,711
Issuance of Series D convertible preferred stock in connection with settlement of convertible promissory notes		$ 30,594
Issuance of Series D convertible preferred stock in connection with settlement of convertible promissory notes, shares		59,164,808
Assumption of profits interest liability by affiliate	991							991
Change in profits interest liability of affiliate	749							749
Noncontrolling interest - distribution of net assets to affiliate and related deconsolidation	(19)							(66)		$ 47
LLC Conversion			$ (89,345)	$ (750)		$ 1		(3,196)	93,290
LLC Conversion, shares			(23,968,178)	(54,600,000)
LLC Conversion, common stock						6,220,050
Conversion of Series D convertible preferred stock into common stock	98,777					$ 1		98,776
Convertible preferred stock, Conversion of Series D convertible preferred stock into common stock, shares		(199,791,519)
Convertible preferred stock, Conversion of Series D convertible preferred stock into common stock, value		$ (98,777)
Conversion of Series D convertible preferred stock into common stock, shares					1,492,059	13,876,510
Initial public offering	198,318					$ 1		198,317
Initial public offering, shares						12,075,000
Taxes related to net share settlement of equity awards	0
Stock-based compensation	3,022							3,022
Net loss	(35,853)								(35,853)
Balance at Dec. 31, 2020	209,974					$ 3		300,888	(90,917)
Balance, shares at Dec. 31, 2020					1,492,059	32,171,560
Noncontrolling interest	0
Issuance of common stock under equity incentive plans	0
Issuance of common stock under equity incentive plans, shares						930,144
Issuance of common stock upon exercise of options, net	$ 140							140
Issuance of common stock upon exercise of options, net, shares	7,747					7,747
Issuance of common stock for Employee Stock Purchase Plan	$ 289							289
Issuance of common stock for Employee Stock Purchase Plan, shares						11,182
Initial public offering	70,994					$ 1		70,993
Initial public offering, shares						2,678,600
Taxes related to net share settlement of equity awards	(291)							(291)
Stock-based compensation	25,117							25,117
Net loss	(95,402)								(95,402)
Balance at Dec. 31, 2021	$ 210,821					$ 4		$ 397,136	$ (186,319)
Balance, shares at Dec. 31, 2021					1,492,059	35,799,233