Stockholders' Equity, Convertible Preferred Stock and Redeemable Non-controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Balance at the beginning			$ 0
Loss attributable to non-controlling interest	$ (437)	$ 1,408	(737)	$ 1,374
Balance at the end	7,370		7,370
Qingdao Xingyang City Investment [Member]
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Balance at the beginning			0
Initial investment			7,047
Accretion of dividend			323
Loss attributable to non-controlling interest			(79)
Adjustment to redemption value			79
Balance at the end	$ 7,370		$ 7,370