Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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The portion of the carrying value of long-term convertible debt as of the balance sheet date that is scheduled to be repaid within one year or in the normal operating cycle if longer. Convertible debt is a financial instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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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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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Fair Value Disclosures - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase (decrease) in fair value of contingent consideration liability		$ 1,000,000	$ 5,013,000
Fair value of liabilities transferred from Level 1 to Level 2		0	0
Fair value of liabilities transferred from Level 2 to Level 1		0	0
Fair value of assets transferred from Level 1 to Level 2		0	0
Fair value of assets transferred from Level 2 to Level 1		0	0
Convertible Notes, aggregate principal amount		167,800,000	167,800,000
Repayment of convertible notes in cash			90,994,000	$ 1,000
R&D expense [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase (decrease) in fair value of contingent consideration liability		(100,000)	900,000
SG&A expense [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase (decrease) in fair value of contingent consideration liability		1,100,000	4,100,000
Scenario, Forecast [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible Notes, aggregate principal amount	$ 167,800,000
Repayment of convertible notes in cash	$ 167,800,000
Common stock, shares issued on redemption of convertible notes	1,769,609
Fair value, measurements, nonrecurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value of the debt		$ 372,600,000	$ 372,600,000		$ 496,800,000