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Long-term Debt (Tables)

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Schedule of convertible debt

The following table summarizes the carrying value of the long-term convertible debt as of June 30, 2021 and December 31, 2020 (in thousands):

			June 30, 2021						December 31, 2020
2024 Notes
Carrying value			$	85,320					$	81,462
Unamortized debt discount and issuance costs			31,731						35,589
Principal amount			$	117,051					$	117,051
Remaining amortization period (years)			3.4						3.9
Fair value			$	132,054					$	153,220
2025 Notes
Carrying value			$	121,230					$	116,349
Unamortized debt discount and issuance costs			51,270						56,151
Principal amount			$	172,500					$	172,500
Remaining amortization period (years)			4.3						4.8
Fair value			$	165,974					$	147,488
2021 Notes
Carrying value			$	26,655					$	26,557
Unamortized issuance costs			82						180
Principal amount			$	26,737					$	26,737
Remaining amortization period (years)			0.4						0.9
Fair value			$	29,279					$	26,470

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Tabular disclosure of convertible debt instrument. Includes, but is not limited to, principal amount and amortized premium or discount.

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