Segment Data and Related Information - Parenthetical Information (Details)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Concentration risk, number of customers		5	5
Concentration Risk, Percent Of Total Consolidated Revenue For Customer Classification	10.00%	10.00%	10.00%
Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, number of customers	5
Customer Concentration Risk | Sales Revenue, Segment | Photovoltaics
Segment Reporting Information [Line Items]
Revenue by customer, percentage	0.00%	0.00%
Customer Concentration Risk | Sales Revenue, Segment | Fiber Optics
Segment Reporting Information [Line Items]
Revenue by customer, percentage	0.00%	0.00%	0.00%
Customer Concentration Risk | Sales Revenue, Net
Segment Reporting Information [Line Items]
Revenue by customer, percentage	35.00%	34.00%	33.00%