Convertible Debt and Notes Payable - Notes Payable (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 24, 2021	Sep. 30, 2020	Sep. 30, 2019	May 07, 2019	Jun. 11, 2018	Dec. 14, 2017	Dec. 08, 2017
Debt and Capital Lease Obligations [Line Items]
Gain/(loss) on debt extinguishment	$ 0	$ (4,538,000)
2024 Notes | Senior Notes
Debt and Capital Lease Obligations [Line Items]
Debt Instrument, Face Amount						$ 53,000,000
Interest rate						7.25%
Debt Instrument, Additional amount issued					$ 25,000,000
Debt Instrument, Unamortized Premium					500,000
Interest Expense, Debt, Excluding Amortization	1,400,000	1,400,000
Debt Issuance Costs, Gross					$ 600,000	$ 1,500,000
2033 Notes | Senior Notes
Debt and Capital Lease Obligations [Line Items]
Debt Instrument, Face Amount				$ 10,000,000			$ 90,000,000
Interest rate							7.75%
Interest Expense, Debt, Excluding Amortization	1,900,000	1,900,000
Debt Issuance Costs, Gross							$ 3,600,000
2027 Notes | Senior Notes
Debt and Capital Lease Obligations [Line Items]
Debt Instrument, Face Amount			$ 138,000,000					$ 18,000,000	$ 120,000,000
Interest rate									7.35%
Interest Expense, Debt, Excluding Amortization		$ 2,500,000
Debt Issuance Costs, Gross									$ 5,000,000
Gain/(loss) on debt extinguishment	$ 4,400,000