Long-Term Debt - Schedule of Interest Expense (Details) - Convertible Senior Notes Due 2025 - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Contractual interest expense	$ 6,038,000	$ 4,897,000
Amortization of debt discount and issuance costs	1,429,000	8,650,000
Total interest expense	$ 7,467,000	13,547,000
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Amortization of debt discount and issuance costs		(7,531,000)
Cumulative Effect, Period of Adoption, Adjusted Balance
Debt Instrument [Line Items]
Contractual interest expense		4,897,000
Amortization of debt discount and issuance costs		1,119,000
Total interest expense		$ 6,016,000