Notes Receivable from Third Parties - Notes Receivable (Details) € in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Oct. 31, 2022 USD ($)	Jul. 29, 2022 USD ($) payment	May 20, 2022 EUR (€)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 24, 2021 USD ($)	Dec. 24, 2021 EUR (€)	Aug. 30, 2021 USD ($)	Aug. 30, 2021 EUR (€)
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	$ 83,863,000		$ 83,863,000						$ 54,907,000
Principal Amount	13,233,000		$ 13,233,000						57,811,000
Notes receivable from related party				$ 464,000
Via Motor Note | Convertible Debt
Debt Securities, Available-for-Sale [Line Items]
Principal Amount | €													€ 42.5
Interest rate												4.00%	4.00%
Timios Promissory Note | Mortgages
Debt Securities, Available-for-Sale [Line Items]
Principal Amount								$ 500,000
VIA Note | Via Motor Note | Convertible Debt
Debt Securities, Available-for-Sale [Line Items]
Notes receivable from related party	$ 10,400,000	$ 5,500,000
VIA Note -2 | Via Motor Note | Convertible Debt
Debt Securities, Available-for-Sale [Line Items]
Principal Amount | €							€ 2.2
Interest rate	4.00%		4.00%
Notes receivable from related party	$ 4,400,000	$ 5,100,000
Timios
Debt Securities, Available-for-Sale [Line Items]
Interest	0		$ 0
Timios | Mortgage Promissory Notes
Debt Securities, Available-for-Sale [Line Items]
Installment amount			3,000
Timios | 3.5% Mortgage Promissory Notes
Debt Securities, Available-for-Sale [Line Items]
Interest rate								3.50%
Timios | 4.875% Mortgage Promissory Notes
Debt Securities, Available-for-Sale [Line Items]
Interest rate								4.875%
Convertible promissory note and interest
Debt Securities, Available-for-Sale [Line Items]
Cost	82,484,000		82,484,000						54,319,000
Interest	2,751,000		2,751,000						588,000
Unrealized Gains	724,000		724,000						0
Unrealized Losses	(2,096,000)		(2,096,000)						0
Impairment	0		0						0
Estimated Fair Value	83,863,000		83,863,000						54,907,000
Convertible promissory note and interest | VIA Note
Debt Securities, Available-for-Sale [Line Items]
Cost	58,418,000		58,418,000						42,500,000			$ 42,500,000
Interest	1,994,000		1,994,000						578,000
Unrealized Gains	0		0						0
Unrealized Losses	0		0						0
Impairment	0		0						0
Estimated Fair Value	60,412,000		60,412,000						43,078,000
Convertible promissory note and interest | VIA Note | Subsequent Event
Debt Securities, Available-for-Sale [Line Items]
Cost					$ 2,000,000
Convertible promissory note and interest | VIA Note -2
Debt Securities, Available-for-Sale [Line Items]
Cost	11,682,000		11,682,000
Interest	105,000		105,000
Unrealized Gains	0		0
Unrealized Losses	0		0
Impairment	0		0
Estimated Fair Value	11,787,000		11,787,000
Convertible promissory note and interest | Inobat Note
Debt Securities, Available-for-Sale [Line Items]
Cost	11,819,000		11,819,000						11,819,000	$ 11,400,000	€ 10.0
Interest	652,000		652,000						10,000
Unrealized Gains	724,000		724,000						0
Unrealized Losses	(2,096,000)		(2,096,000)						0
Impairment	0		0						0
Estimated Fair Value	11,099,000		11,099,000						$ 11,829,000
Interest rate										8.00%	8.00%
Convertible promissory note and interest | Timios
Debt Securities, Available-for-Sale [Line Items]
Cost	520,000		520,000
Interest	0		0
Unrealized Gains	0		0
Unrealized Losses	0		0
Impairment	0		0
Estimated Fair Value	520,000		520,000
Convertible promissory note and interest | Green Power Motor Company
Debt Securities, Available-for-Sale [Line Items]
Cost	45,000		45,000
Interest	0		0
Unrealized Gains	0		0
Unrealized Losses	0		0
Impairment	0		0
Estimated Fair Value	$ 45,000		$ 45,000
Notes receivable, face amount						$ 43,500
Fixed interest rate						7.50%
Number of consecutive monthly payments | payment						80