Fair Value Measurements - Fair Value of Debt (Details) - Convertible debt - USD ($) $ in Thousands	Dec. 31, 2021	Apr. 13, 2021	Dec. 31, 2020	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt				$ 107,000
Four Point Five Zero Percent Convertible Senior Notes Due 2026
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt	$ 137,500	$ 137,500
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Related party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt	62,500
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Others
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt	75,000
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value	113,226
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Fair value | Related party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value	51,466
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Fair value | Others
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value	61,760
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value	136,871
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Carrying value | Related party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value	62,268
Four Point Five Zero Percent Convertible Senior Notes Due 2026 | Carrying value | Others
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value	$ 74,603
Five Point Five Zero Percent Convertible Senior Notes Due 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt			$ 107,000
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Related party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt			10,000
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Others
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Related party debt			97,000
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value			102,213
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Fair value | Related party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value			9,553
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Fair value | Others
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value			92,660
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value			99,989
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Carrying value | Related party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value			9,411
Five Point Five Zero Percent Convertible Senior Notes Due 2021 | Carrying value | Others
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value and carrying value			$ 90,578