Segment and Geographic Information - Long-Lived Assets, Consisting of Property, Plant and Equipment by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 50,183	$ 47,506
North America
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	40,232	38,505
Asia/Pacific
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	870	1,646
Europe
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 9,081	$ 7,355