Geographic and Segment Information (Schedule of Long-Lived Assets, by Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 50,122	$ 46,504
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	10,262	9,696
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	17	7
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	4,053	3,424
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 35,790	$ 33,377