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Convertible Senior Notes, Net - Amounts Recorded in Interest Expense Related to Notes (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
2025 Convertible Senior Notes
Debt Disclosure [Line Items]
Contractual interest expense	$ 1,294
Amortization of debt discount	871
Amortization of debt issuance costs	263
Total interest and amortization expense	2,428
2028 Convertible Senior Notes
Debt Disclosure [Line Items]
Contractual interest expense	176
Amortization of debt discount	640
Amortization of debt issuance costs	41
Total interest and amortization expense	$ 857

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