Segment Information - Summary of Assets by Geographic Region (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 128,953	$ 194,906
United States [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	98,211	156,105
Malaysia [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	30,705	38,765
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 37	$ 36