Segment Information - Summary of Assets by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 204,105	$ 202,695
United States [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	162,727	157,572
Malaysia [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	41,348	45,086
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 30	$ 37