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, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 84,834	$ 77,788	$ 244,825	$ 229,178
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	9,571	9,517	28,449	27,731
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	9,838	10,477	32,689	20,579
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	16,456	13,638	45,499	50,532
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	5,916	8,194	16,569	23,241
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	4,000	3,311	10,544	10,064
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	12,344	11,230	35,099	30,447
Other Asia Pacific countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,435	5,880	18,390	18,374
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	19,587	14,797	56,207	46,681
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 687	$ 744	$ 1,379	$ 1,529