Other Assets (Narrative) (Details) (USD $)	1 Months Ended				6 Months Ended
	Sep. 30, 2012	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2012	Mar. 31, 2014 Technology licenses, net Minimum	Mar. 31, 2014 Technology licenses, net Maximum	Mar. 31, 2014 Hong Kong	Mar. 31, 2014 Pledged Nanya private placement shares
Entity Information [Line Items]
Purchases of available for sale securities	$ 27,100,000
Termination period	1 year
Nanya private placement shares		10,619,000	10,920,000					5,200,000
Estimated useful lives					3 years	10 years
Other investments		$ 1,545,000	$ 1,684,000	$ 2,000,000
Equity method investment ownership percentage							31.00%