Commitments and Contingencies (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	Mar. 31, 2012 defendant	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jan. 28, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Rent expense related to non-cancelable operating leases net of sublease income		$ 1,200	$ 800	$ 2,400	$ 1,700
Sublease income		200	$ 200	$ 400	300
Contractual obligation term				3 years
Contractual commitment		5,300		$ 5,300
Remaining balance on contractual commitment		1,800		1,800
Amount of funding				6,270
Amount of seller financing							$ 5,900
Gain on extinguishment		500		463	$ 0
Number of defendants | defendant	5
Reserves for known and incurred but not reported claims		700		700
Fair Value, Inputs, Level 3 | Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain recognized as a result of changes in fair value		$ 0		0		$ 2,400
Fair value adjustment				$ 1,900