Segment Data and Related Information (Other Disclosures) (Details)	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended
	Jun. 30, 2014 segment division	Sep. 30, 2013	Jun. 30, 2014 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Jun. 30, 2013 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Jun. 30, 2014 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Jun. 30, 2013 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Jun. 30, 2013 Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Jun. 30, 2014 Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Jun. 30, 2013 Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Jun. 30, 2014 Alcatel-Lucent Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Jun. 30, 2013 Suncore Customer Concentration Risk Sales Revenue, Segment
Segment Reporting [Abstract]
Number of operating segments	3
Number of reporting segments	2
Segment Reporting Information [Line Items]
Revenue by customer, percentage			0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	11.00%	11.00%
Percentage of long-lived assets located in the United States	80.00%	80.00%