Principal amount per share.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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- Definition

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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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Description of debt redemption features under terms of the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

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- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

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No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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Senior Convertible Notes - Additional Information (Detail) $ / shares in Units, $ in Thousands, shares in Millions							3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Aug. 17, 2015 USD ($)	Aug. 10, 2015 USD ($) d $ / shares	Aug. 10, 2015 USD ($) $ / shares shares	Jul. 28, 2015 USD ($)	Aug. 18, 2010 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Aug. 14, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount for conversion										$ 93,500
Payments on senior notes									$ 64,287
Loss on extinguishment of debt							$ (1,049)		(1,049)
Deerfield
Debt Instrument [Line Items]
Premium of issuance of 2018 debt							397	$ 306	1,142	$ 7,189
Senior convertible notes due August 15, 2018
Debt Instrument [Line Items]
Principal amount	$ 27,690		$ 27,700	$ 27,700			27,690		27,690
Senior notes, effective interest rate			5.75%	5.75%
Unamortized premium	717		$ 717	$ 717			717		717
Maturity date			Aug. 15, 2018
No of convertible shares			147.0859
Principal amount per share \| $ / shares			$ 1,000
Conversion price of shares \| $ / shares			$ 6.80	$ 6.80
Percentage of repurchase price			100.00%
Debt Instrument, redemption description			On or after the date that is one year following the original issue date of the 2018 notes, the Company will have the right to redeem for cash all or part of the 2018 notes if the last reported sale price of its common stock exceeds 130% of the conversion price then in effect for 20 or more trading days during the 30 consecutive trading day period ending on the trading day immediately prior to the date of the redemption notice. The redemption price will equal the sum of 100% of the principal amount of the 2018 notes to be redeemed, plus accrued and unpaid interest.
Percentage of conversion price equaling stock price			130.00%
Number of trading days \| d			20
Consecutive trading days			30 days
Debt Issuance Cost						$ 800
Premium of issuance of 2018 debt							29,000		29,000
Senior convertible notes due December 31, 2019 \| Deerfield
Debt Instrument [Line Items]
Principal amount	$ 60,000						$ 60,000		$ 60,000
Senior notes, effective interest rate	9.75%						9.75%		9.75%
Senior convertible notes due December 31, 2019 \| Deerfield \| Less portion of commitment asset
Debt Instrument [Line Items]
Principal amount	$ 20,000						$ 20,000		$ 20,000
Senior notes, effective interest rate	8.75%						8.75%		8.75%
Senior convertible notes due August 15, 2015
Debt Instrument [Line Items]
Principal amount	$ 100,000						$ 100,000		$ 100,000		$ 32,100	$ 100,000
Senior notes, effective interest rate											5.75%
Aggregate principal amount for conversion					$ 56,900
Number of shares issued up on conversion of debt \| shares				1.9
Principal amount of debt converted				$ 8,000
Payments on senior notes	$ 32,100	$ 32,200
Loss on extinguishment of debt		$ (1,049)
Senior convertible notes due August 15, 2015 \| Convertible Debt
Debt Instrument [Line Items]
Conversion price of shares \| $ / shares			$ 4.40	$ 4.40