Segment Data and Related Information (Other Disclosures) (Details)	12 Months Ended
	Sep. 30, 2013 segment division	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting [Abstract]
Number of operating segments	3
Number of reporting segments	2
Segment Reporting Information [Line Items]
Revenue by customer, percentage	34.00%	33.00%	40.00%
Percentage of long-lived assets located in the United States	80.00%	86.00%	93.00%
Photovoltaics
Segment Reporting Information [Line Items]
Revenue by customer, percentage	0.00%
SSL | Photovoltaics
Segment Reporting Information [Line Items]
Revenue by customer, percentage		14.00%	11.00%
Suncore | Photovoltaics
Segment Reporting Information [Line Items]
Revenue by customer, percentage	9.00%