Geographic and Segment Information (Schedule of Revenues, by Geographical Areas) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 64,781	$ 69,809	$ 193,450	$ 199,169
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	9,774	9,207	32,549	29,635
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	3,997	1,768	8,995	7,242
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	15,264	20,951	43,358	53,819
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,826	5,447	21,586	17,413
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	3,147	3,034	8,374	8,845
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,663	7,196	19,033	21,066
Other Asia Pacific countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	4,794	7,356	15,706	18,137
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	13,893	14,304	42,620	41,655
Other geographic areas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 423	$ 546	$ 1,229	$ 1,357