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Convertible Debt - Narrative (Details)					1 Months Ended	12 Months Ended
	Aug. 03, 2020 $ / shares shares	Dec. 26, 2019 USD ($) $ / shares	Aug. 01, 2019 USD ($)	Feb. 28, 2019 USD ($)	Aug. 31, 2020 USD ($) shares	Dec. 31, 2021 USD ($) day $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)	Dec. 31, 2019 KRW (₩)	Dec. 26, 2019 KRW (₩)	Aug. 01, 2019 KRW (₩)	Mar. 01, 2019 USD ($)
Debt Instrument [Line Items]
Interest expense						$ 1,936,447	$ 8,702,450	$ 7,948,539
Change in fair value of derivative liability						0	(75,670,977)	(1,763,652)
6.50% Convertible Senior Notes Due 2024
Debt Instrument [Line Items]
Debt instrument, face amount						78,500,000
Debt issuance costs, net						219,101
Debt instrument, unamortized discount						1,591,909
Gain (loss) on extinguishment of convertible bonds and senior notes						$ 0	8,762,030	$ 0
6.50% Convertible Senior Notes Due 2024 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount												$ 78,500,000
Debt interest based on the fixed rate						6.50%		6.50%	6.50%			6.50%
Proceeds from issuance of debt				$ 75,700,000				$ 75,700,000
Debt instrument, convertible, conversion price (in USD per share) | $ / shares						$ 5.38
Debt instrument, convertible, threshold percentage of stock price trigger						130.00%
Debt instrument, convertible, threshold trading days | day						20
Debt instrument, convertible, threshold consecutive trading days | day						30
Debt instrument, redemption price, percentage						100.00%
Long-term debt, fair value												$ 62,200,000
Debt issuance costs, net												2,800,000
Debt instrument, unamortized discount												$ 18,600,000
Debt instrument, interest rate, effective percentage						13.10%
Debt instrument, convertible, conversion ratio				0.1858045
Debt conversion, converted instrument principal amount							$ 62,100,000
Debt conversion, converted instrument, shares issued (in shares) | shares							11,535,660
Fair value of date conversion							$ 43,700,000
Debt instrument, convertible, carrying amount of equity component							52,500,000
Gain (loss) on extinguishment of convertible bonds and senior notes							8,800,000
Interest expense						$ 1,900,000	6,900,000
Interest expense, debt						1,100,000	4,100,000
August 2019 Bonds
Debt Instrument [Line Items]
Gain (loss) on extinguishment of convertible bonds and senior notes						$ 0	(8,177,043)	0
August 2019 Bonds | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount			$ 15,000,000					$ 15,000,000	₩ 18,000,000,000		₩ 18,000,000,000
Debt interest based on the fixed rate			1.00%					100.00%	100.00%		1.00%
Proceeds from issuance of debt			$ 14,500,000					$ 14,500,000
Debt instrument, convertible, conversion price (in USD per share) | $ / shares	$ 3.14
Debt instrument, unamortized discount			7,300,000
Debt conversion, converted instrument, shares issued (in shares) | shares	4,962,364				4,692,364
Debt instrument, convertible, carrying amount of equity component			$ 7,100,000
Gain (loss) on extinguishment of convertible bonds and senior notes					$ (8,200,000)
Interest expense							1,600,000
Interest expense, debt							87,000
Fair value of derivative liability					84,500,000
Change in fair value of derivative liability					$ 75,700,000
August 2019 Bonds | Convertible Debt | Initial Conversion Price
Debt Instrument [Line Items]
Debt instrument, convertible, conversion price (in USD per share) | $ / shares	$ 4.00
Debt instrument, convertible, conversion ratio	0.0002110595
August 2019 Bonds | Convertible Debt | After January 2, 2020 Conversion Price
Debt Instrument [Line Items]
Debt instrument, convertible, conversion ratio	0.0002756873
December 2019 Bonds | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount		$ 4,100,000						$ 4,100,000	₩ 4,700,000,000	₩ 4,700,000,000
Debt interest based on the fixed rate		1.00%						1.00%	1.00%	1.00%
Proceeds from issuance of debt		$ 4,000,000						$ 4,000,000
Debt instrument, interest rate, effective percentage						6.20%
Debt conversion, converted instrument, shares issued (in shares) | shares						1,009,450
Interest expense						$ 50,000	253,000
Interest expense, debt						9,000	$ 40,000
Stock Issued During Period, Value, Conversion of Units						$ 4,400,000
December 2019 Bonds | Convertible Debt | Initial Conversion Price
Debt Instrument [Line Items]
Debt instrument, convertible, conversion price (in USD per share) | $ / shares		$ 4.00
Debt instrument, convertible, conversion ratio		0.0002147766
December 2019 Bonds | Convertible Debt | After July 2, 2020 Conversion Price
Debt Instrument [Line Items]
Debt instrument, convertible, conversion ratio		0.0003579611

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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No definition available.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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