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Contractual interest rate for funds borrowed, under the debt agreement.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

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Related party Transactions - Additional Information (Details) $ / shares in Units, shares in Millions			1 Months Ended					3 Months Ended				12 Months Ended
	Jun. 05, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Sep. 30, 2020	Nov. 30, 2019 USD ($) item	Jul. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Feb. 20, 2019 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($) item	Mar. 31, 2019 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($) Y	Dec. 31, 2019 USD ($)	Nov. 19, 2020	Dec. 19, 2019 $ / shares	Oct. 29, 2019 $ / shares	Feb. 22, 2019 $ / shares
Related Party Transaction [Line Items]
Intangible assets, net									$ 52,771,000				$ 29,705,000	$ 52,771,000
Long term investment									22,621,000				8,570,000	22,621,000
Salary, severance and expenses							$ 800,000	$ 100,000			$ 600,000
Due to other related parties													100,000
Impairment loss													200,000	3,000,000.0
Amount due to related parties									3,962,000				882,000	3,962,000
Conversion price of note convertible \| $ / shares																$ 1.00	$ 1.84	$ 1.84
Amount of debt converted													4,600,000
Amount of debt transferred													50,900,000
Debt Instrument, Interest Rate, Stated Percentage																10.00%
Service charges													1,000	467,000
Professional fees													12,541,000	5,828,000
Amount due from related parties									1,256,000				240,000	1,256,000
Impairment of Intangible Assets (Excluding Goodwill)													$ 20,400,000	5,700,000
Equity Method Investment, Ownership Percentage															27.00%
GTB Tokens
Related Party Transaction [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)									61,100,000					61,100,000
Amer Global Technology Limited [Member]
Related Party Transaction [Line Items]
Ownership interest disposed		10.00%	10.00%										10.00%
Equity Method Investment, Ownership Percentage		10.00%											10.00%
Borrowing from Dr. Wu. and his affiliates
Related Party Transaction [Line Items]
Short-term Debt									$ 3,300,000				$ 3,500,000	3,300,000
Conversion price of note convertible \| $ / shares	$ 0.59
Amount of debt converted	$ 1,500,000
Amount of debt transferred	$ 400,000
Selling, general and administrative expenses
Related Party Transaction [Line Items]
Salary, severance and expenses														800,000
Borrowing from Dr. Wu. and his affiliates
Related Party Transaction [Line Items]
Shares issued upon conversion of debt \| shares	2.6
DBOT
Related Party Transaction [Line Items]
Short-term Debt		$ 550,000
Repayments of short term debt					$ 300,000
Debt Instrument, Interest Rate, Stated Percentage		0.00%
Digital asset management services [Member]
Related Party Transaction [Line Items]
Assets sold under agreements carrying amount													$ 7,100,000
Digital asset management services [Member] \| Measurement Input, Discount Rate [Member]
Related Party Transaction [Line Items]
Estimated value of GTB													76.0
Digital asset management services [Member] \| Expected term
Related Party Transaction [Line Items]
Estimated value of GTB \| Y													3.0
Digital asset management services [Member] \| Expected volatility
Related Party Transaction [Line Items]
Estimated value of GTB													155
Digital asset management services [Member] \| Expected dividend yield
Related Party Transaction [Line Items]
Estimated value of GTB													0
Digital asset management services [Member] \| Risk free interest rate
Related Party Transaction [Line Items]
Estimated value of GTB													2.25
Digital asset management services [Member] \| Level II
Related Party Transaction [Line Items]
Consideration on sale of assets													$ 40,700,000	40,700,000
Mobile Energy Group
Related Party Transaction [Line Items]
Percentage of ownership interest		50.01%
Qianxi
Related Party Transaction [Line Items]
Number of Ev taxis order to third party \| item										4,172
commission payable on compleion of order										$ 2,700,000
iUnicorn \| Mobile Energy Group
Related Party Transaction [Line Items]
Percentage of ownership interest		49.99%
Shenma
Related Party Transaction [Line Items]
Amount of shares issued				$ 4,900,000
Number of installments \| item				6
Payments to acquire equity Interest													500,000	$ 500,000
Shenma \| Qianxi
Related Party Transaction [Line Items]
Percentage of ownership interest				1.72%
Service agreement with SSSIG
Related Party Transaction [Line Items]
Professional fees													700,000
Service agreement with SSSIG \| Selling, general and administrative expenses
Related Party Transaction [Line Items]
Amount due to related parties													200,000
Transaction with related party												$ 1,400,000
Glory
Related Party Transaction [Line Items]
Amount due to related parties													500,000
Net balance due to related parties													300,000
Amount due from related parties													200,000
Research and development contract with a related party \| Research and development expense
Related Party Transaction [Line Items]
Transaction with related party													2,800,000
Service charges													1,600,000
GTD
Related Party Transaction [Line Items]
Assets sold under agreements carrying amount						$ 20,400,000					$ 20,400,000
Consideration on sale of assets						$ 1,300,000
GTD \| Animation copy right
Related Party Transaction [Line Items]
Assets sold under agreements carrying amount													200,000
GTD \| License content
Related Party Transaction [Line Items]
Licensed content													17,000,000.0
GTD \| Nanjing Shengyi Network Technology Co., Ltd
Related Party Transaction [Line Items]
Long term investment													$ 3,200,000
GTD \| Nanjing Shengyi Network Technology Co., Ltd \| Ideanomics, Inc [Member]
Related Party Transaction [Line Items]
Percentage of ownership interest													13.00%