Commitments and Contingencies - Summary of Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Beginning Balance			$ 237
Restructuring Expenses	$ 24	$ 440	541	$ 440
Cash Payments/ Adjustments			(481)
Ending Balance	297		297
Severance and Related Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			237
Restructuring Expenses			253
Cash Payments/ Adjustments			(348)
Ending Balance	142		142
Lease Terminations [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0
Restructuring Expenses			239
Cash Payments/ Adjustments			(84)
Ending Balance	155		155
Fixed Assets [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0
Restructuring Expenses			49
Cash Payments/ Adjustments			(49)
Ending Balance	$ 0		$ 0