Condensed Consolidated Statement of Changes in Redeemable Noncontrolling Interest and Stockholders' Deficit - (Unaudited) - USD ($) $ in Thousands	Total	Class A Common Stock [Member]	Class B Common Stock [Member]	Noncontrolling Interest [Member] Redeemable Noncontrolling Interest [Member]	Common Stock [Member] Class A Common Stock [Member]	Common Stock [Member] Class B Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2020	$ (80,102)				$ 541	$ 232	$ 209,161	$ (290,036)
Beginning balance, redeemable noncontrolling interest at Dec. 31, 2020				$ 83,895
Beginning balance, shares at Dec. 31, 2020					54,050,710	23,094,221
Net loss	(4,241)			(1,701)				(0)
Share-based compensation	0						0
Exchange of Class B Common Stock for Class A Common Stock, shares					0	(0)
Exercise of stock options	0						0
Exercise of stock options, shares					0
Issuance of Class A Common Stock under LPC Agreement	0				$ 35		0
Issuance of Class A Common Stock under LPC Agreement, shares					0
Change in redemption value of noncontrolling interest	19,547			(19,547)				0
Ending balance at Mar. 31, 2021	(56,275)				$ 576	$ 232	217,647	(274,730)
Ending balance, redeemable noncontrolling interest at Mar. 31, 2021				62,647
Ending balance, shares at Mar. 31, 2021					57,571,904	23,093,860
Beginning balance at Dec. 31, 2021	(9,740)				$ 669	$ 232	238,193	(248,834)
Beginning balance, redeemable noncontrolling interest at Dec. 31, 2021				24,962
Beginning balance, shares at Dec. 31, 2021		66,942,777	23,093,860		66,942,777	23,093,860
Net loss	(7,007)			(2,417)				(0)
Share-based compensation	0						0
Change in redemption value of noncontrolling interest	8,178			(8,178)				0
Ending balance at Mar. 31, 2022	(8,093)				$ 669	$ 232	$ 238,669	$ (247,663)
Ending balance, redeemable noncontrolling interest at Mar. 31, 2022	$ 14,367			$ 14,367
Ending balance, shares at Mar. 31, 2022		66,942,777	23,093,860		66,942,777	23,093,860