Face (par) amount of debt instrument at time of issuance.

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- Definition

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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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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Interest paid other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Debt - Summary of Convertible Senior Notes (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Aug. 31, 2019	Aug. 09, 2019	Jul. 26, 2018	Aug. 31, 2017	Jun. 30, 2014
Debt Instrument [Line Items]
Principal/ Fair Value Amount	$ 52,658,000	$ 140,974,000
Debt Issuance Costs	0	1,182,000
Net Amount	52,658,000	139,792,000
Payment-in-kind interest	1,725,000	0	$ 0
4.875% Convertible Senior Notes Due 2020
Debt Instrument [Line Items]
Principal/ Fair Value Amount	1,905,000	113,000,000			$ 113,000,000			$ 115,000,000
Debt Issuance Costs	0	1,182,000
Net Amount	$ 1,905,000	111,818,000
Debt instrument, interest rate	4.875%			4.875%				4.875%
3.25% Convertible Senior Notes Due 2020
Debt Instrument [Line Items]
Principal/ Fair Value Amount	$ 0	27,974,000				$ 8,000,000.0
Debt Issuance Costs	0	0
Net Amount	$ 0	27,974,000
Debt instrument, interest rate	3.25%					3.25%
3.25% Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Principal/ Fair Value Amount	$ 50,753,000	0
Debt Issuance Costs	0	0
Net Amount	$ 50,753,000	0
Debt instrument, interest rate	3.25%			3.25%		3.25%
Oasis Management and Oasis Investments ll Master Fund Ltd. \| 3.25% Convertible Senior Notes Due 2020
Debt Instrument [Line Items]
Principal/ Fair Value Amount	$ 0	29,600,000.0				$ 8,000,000	$ 21,600,000
Oasis Management and Oasis Investments ll Master Fund Ltd. \| 3.25% Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Principal/ Fair Value Amount	37,600,000	$ 0		$ 8,000,000.0
Payment-in-kind interest	$ 400,000