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Restructuring - Schedule of Restructuring Charges (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Restructuring and Related Activities [Abstract]        
Employee-related charges $ 12 $ 23 $ 25 $ 135
Lease termination charges 203 475 325 585
Total $ 215 $ 498 $ 350 $ 720