Stockholders' Equity, Redeemable Convertible Preferred Stock and Redeemable Non-controlling Interest - Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at the beginning	$ 7,485
Initial investment			$ 2,406
Loss attributable to non-controlling interest	(714)	$ (10,501)	$ 852
Balance at the end	0	7,485
Qingdao Xingyang City Investment
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at the beginning	7,485
Initial investment		7,047
Accretion of dividend	464	438
Loss attributable to non-controlling interest	(206)	(135)
Adjustment to redemption value	206	135
Settlement	(7,949)
Balance at the end	$ 0	$ 7,485