Segment Data and Related Information (Other Disclosures) (Details)	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2014 segment division	Sep. 30, 2013	Mar. 31, 2014 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Mar. 31, 2013 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Mar. 31, 2014 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Mar. 31, 2013 Customer Concentration Risk Sales Revenue, Segment Photovoltaics	Mar. 31, 2014 Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Mar. 31, 2013 Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Mar. 31, 2014 Customer Concentration Risk Sales Revenue, Segment Fiber Optics	Mar. 31, 2013 Customer Concentration Risk Sales Revenue, Segment Fiber Optics
Segment Reporting [Abstract]
Number of operating segments	3
Number of reporting segments	2
Segment Reporting Information [Line Items]
Revenue by customer, percentage			12.00%	0.00%	11.00%	0.00%	0.00%	0.00%	0.00%	0.00%
Percentage of long-lived assets located in the United States	81.00%	80.00%