Fair Value Measurements Derivative Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Amortization of Intangible Assets	$ 1,000	$ 900	$ 1,600	$ 1,800
Embedded Derivative [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	589		589		$ 1,015
Warrant [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(13,832)		(13,832)		(12,123)
Debt Prepayment Derivative [Member] | Contingent Consideration Liability [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(23,555)		(23,555)		(9,131)
Fair Value, Inputs, Level 1 [Member] | Embedded Derivative [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(612)		(612)		1,015
Fair Value, Inputs, Level 1 [Member] | Warrant [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	0		0		0
Fair Value, Inputs, Level 1 [Member] | Debt Prepayment Derivative [Member] | Contingent Consideration Liability [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	0		0		0
Fair Value, Inputs, Level 2 [Member] | Embedded Derivative [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	1,201		1,201		0
Fair Value, Inputs, Level 2 [Member] | Warrant [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	0		0		0
Fair Value, Inputs, Level 2 [Member] | Debt Prepayment Derivative [Member] | Contingent Consideration Liability [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	0		0		0
Fair Value, Inputs, Level 3 [Member] | Embedded Derivative [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	0		0		0
Fair Value, Inputs, Level 3 [Member] | Warrant [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(13,832)		(13,832)		(12,123)
Fair Value, Inputs, Level 3 [Member] | Debt Prepayment Derivative [Member] | Contingent Consideration Liability [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ (23,555)		$ (23,555)		$ (9,131)