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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 77,788	$ 64,781	$ 229,178	$ 193,450
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	9,517	9,774	27,731	32,549
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	10,477	3,997	20,579	8,995
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	13,638	15,264	50,532	43,358
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	8,194	6,826	23,241	21,586
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	3,311	3,147	10,064	8,374
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	11,230	6,663	30,447	19,033
Other Asia Pacific countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	5,880	4,794	18,374	15,706
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	14,797	13,893	46,681	42,620
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 744	$ 423	$ 1,529	$ 1,229