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Long-term Investments - Additional Information (Details) € / shares in Units, $ / shares in Units, € in Millions											1 Months Ended	7 Months Ended		12 Months Ended
	Aug. 02, 2021 USD ($)	Aug. 02, 2021 EUR (€)	Jul. 26, 2021 USD ($)	Jun. 11, 2021 USD ($)	Apr. 20, 2021 USD ($) $ / shares shares	Mar. 03, 2021 USD ($) $ / shares shares	Nov. 19, 2020 USD ($) $ / shares shares	Oct. 22, 2020 USD ($) $ / shares shares	Jul. 18, 2019 USD ($) $ / shares shares	Apr. 24, 2018 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) a area $ / shares	Aug. 13, 2021 USD ($)	Aug. 13, 2021 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 party	Dec. 31, 2021 EUR (€)	Aug. 13, 2021 EUR (€)	Apr. 21, 2021	Mar. 31, 2021	Mar. 03, 2021 EUR (€) € / shares	Jan. 28, 2021 USD ($) seat	Jan. 28, 2021 EUR (€) seat	Dec. 20, 2019 USD ($)	Dec. 20, 2019 EUR (€)	Jul. 01, 2019
Long-term Investments
Dividends received														$ 0	$ 0	$ 0
Investment cost							$ 1,300,000
Share price (in dollars per share) \| $ / shares											$ 0.23					$ 0.23
Equity method investments											$ 17,881,000			28,088,000	3,700,000	$ 17,881,000
Initial investment														38,070,000	2,600,000
Number of seats on the board of directors \| seat																							4	4
Impairment of equity method investments														7,864,000	16,650,000	13,100,000
Solectrac
Long-term Investments
Shares acquired (in shares) \| shares								1,400,000
Percentage of shares acquired								15.00%
Purchase price (in dollars per share) \| $ / shares								$ 0.91
Additional share price (in dollars per share) \| $ / shares							$ 1.00
FNL
Long-term Investments
Common stock issued to equity method investee (in shares) \| shares					100,000
Shares subscribed but not issued (in shares) \| shares					600,000
Equity investment conversion (in shares) \| shares					30,902
Common Stock \| FNL
Long-term Investments
Share price (in dollars per share) \| $ / shares					$ 8.09
Conversion amount for future equity					$ 250,000
Grapevine Logic, Inc. ("Grapevine")
Long-term Investments
Percentage of ownership interest					100.00%																						100.00%
FNL
Long-term Investments
Percentage of ownership interest					29.00%															29.00%
Cash \| FNL
Long-term Investments
Equity method investments					$ 2,900,000
Solectrac
Long-term Investments
Shares acquired (in shares) \| shares							1,300,000
Equity method investment								$ 1,300,000
Ownership percentage, equity method																					24.30%
Equity method investments											0			0	2,556,000	0
Initial investment														0	2,600,000
Impairment of equity method investments														0	0
Energica Investment
Long-term Investments
Equity method investment						$ 13,600,000																€ 10.1
Ownership percentage, equity method						20.00%																20.00%
Equity method investment (in shares) \| shares						6,100,000
Share price (in dollars per share) \| (per share)						$ 2.21																€ 1.78
Selling restriction period						90 days
Carrying amount of equity investment sold														11,000,000
Investment fair value														21,800,000
MDI Fund
Long-term Investments
Equity method investment			$ 25,000,000
Equity method investments														3,765,000	0
Initial investment			$ 600,000											4,646,000
Impairment of equity method investments														0
TM2
Long-term Investments
Ownership percentage, equity method																							10.00%	10.00%
Equity method investments											1,227,000			0	1,144,000	1,227,000
Initial investment														7,226,000	0
Number of seats on the board of directors \| seat																							1	1
Impairment of equity method investments														7,864,000	0
PEA
Long-term Investments
Ownership percentage, equity method					30.00%
Equity method investment (in shares) \| shares						11,175
Equity method investments														9,138,000	0
Initial investment	$ 9,100,000	€ 7.5												9,138,000
Impairment of equity method investments														$ 0
Intelligenta
Long-term Investments
Ownership percentage, equity method										20.00%				60.00%				60.00%
Equity method investments											9,800,000				0	9,800,000
Initial investment															0
Impairment of equity method investments															9,800,000
Seasail
Long-term Investments
Ownership percentage, equity method										40.00%
Glory
Long-term Investments
Equity method investments											$ 6,854,000				0	6,854,000
Initial investment															0
Impairment of equity method investments															6,850,000	13,100,000
Glory \| Scenario, Plan
Long-term Investments
Value of capital stock issued									$ 20,000,000
Bigfair \| Call option
Long-term Investments
Value of capital stock issued									13,200,000
FNL
Long-term Investments
Equity method investments														$ 2,856,000	0
Initial investment														3,505,000
Impairment of equity method investments														0
Non Marketable Equity Investments
Long-term Investments
Impairment loss with respect to one non-marketable equity investment														4,500,000	200,000	3,000,000
Non Marketable Equity Investments \| TM2
Long-term Investments
Equity method investment												$ 5,900,000							€ 5.0				$ 1,800,000	€ 1.5
Increase in investment												$ 4,100,000	€ 3.5
Threshold of equity financing																							$ 6,800,000	€ 5.0
Pre-investment valuation amount																									$ 11,100,000	€ 10.0
Current valuation amount														12,500,000				€ 11.0
Solectrac
Long-term Investments
Cash paid at closing, including working capital estimates				$ 17,700,000
Equity ownership percentage				100.00%
Total purchase price paid				$ 24,952,000
Percentage of ownership interest acquired				78.60%
Intelligenta
Long-term Investments
Cash paid at closing, including working capital estimates										$ 2,000,000
Number of unrelated party \| party																	2
Total purchase price paid										9,800,000					$ 9,800,000	$ 9,800,000
Value of capital stock issued										$ 7,800,000
Share price of capital stock issued (in dollars per share) \| $ / shares										$ 2.60
Number of common stock issued (in shares) \| shares										3,000,000
Glory
Long-term Investments
Value of capital stock issued									$ 24,400,000
Number of common stock issued (in shares) \| shares									12,200,000
Percentage of ownership interest acquired									34.00%
Shares issued (in dollars per share) \| $ / shares									$ 2.00
Allocation of consideration to equity method investment														23,000,000
Allocation of consideration to call option														1,400,000
Glory \| Scenario, Plan
Long-term Investments
Allocation of consideration to call option														0
Glory \| Glory \| Scenario, Plan
Long-term Investments
Shares issued (in dollars per share) \| $ / shares									$ 1.64
Allocation of consideration to equity method investment														$ 20,000,000
Glory \| Bigfair
Long-term Investments
Percentage of ownership interest acquired									51.00%
Bigfair \| Call option
Long-term Investments
Percentage of ownership interest acquired									40.00%
Tree Technologies
Long-term Investments
Percentage of ownership interest acquired											51.00%					51.00%
Number of acres \| area											250
Tree Technologies \| Glory
Long-term Investments
Number of acres \| a											250