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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Debt - Summary of Long Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	Jan. 11, 2021	Dec. 31, 2020	May 04, 2020
Debt Instrument [Line Items]
Unamortized debt discount	$ (13,712)
Unamortized debt issuance costs	(759)
Equipment financing obligations	1,716				$ 3,808
Total debt	533,495				171,928
Less: Current portion of equipment financing obligations	(1,564)				(2,841)
Total long-term debt, net	531,931				169,087
Convertible Debt \| 0.25% Convertible Senior Notes due 2028
Debt Instrument [Line Items]
Principal	345,000				0
Unamortized debt discount	(9,326)				0
Unamortized debt issuance costs	(216)				0
Long-term debt	335,458				0
Stated interest rate (as a percent)			0.25%	0.25%
Convertible Debt \| 1.25% Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Principal	201,250				201,250
Unamortized debt discount	(4,386)				(32,592)
Unamortized debt issuance costs	(543)				(538)
Long-term debt	196,321				168,120
Stated interest rate (as a percent)		1.25%	1.25%			1.25%
Equipment Financing Obligations
Debt Instrument [Line Items]
Unamortized debt discount	0
Unamortized debt issuance costs	0
Less: Current portion of equipment financing obligations	$ (1,564)				$ (2,841)