Geographic and Segment Information (Schedule of Long-Lived Assets, by Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 57,266	$ 58,847
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	11,055	11,174
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	11	14
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	13,010	12,908
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 33,190	$ 34,751