Stockholders' Equity, Convertible Preferred Stock and Redeemable Non-controlling Interest (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Balance at the beginning	$ 0
Loss attributable to non-controlling interest	(7,827)	$ 852
Balance at the end	7,485	$ 0
Qingdao Xingyang City Investment [Member]
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Initial investment	7,047
Accretion of dividend	438
Loss attributable to non-controlling interest	(135)
Adjustment to redemption value	135
Balance at the end	$ 7,485

Amount of increase in noncontrolling interest from accretion of dividend.

No definition available.

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- Definition

Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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- Definition

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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