Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013 Buildings and improvements	Sep. 30, 2013 Equipment Minimum	Sep. 30, 2013 Equipment Maximum	Sep. 30, 2013 Furniture and fixtures	Sep. 30, 2013 Computer hardware and software Minimum	Sep. 30, 2013 Computer hardware and software Maximum	Sep. 30, 2013 Leasehold improvements Minimum	Sep. 30, 2013 Leasehold improvements Maximum	Sep. 30, 2013 Photovoltaics	Jun. 30, 2013 Suncore
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives				40 years	3 years	5 years	5 years	3 years	7 years	5 years	7 years
Goodwill	$ 20,384,000	$ 20,384,000										$ 20,400,000
Asset retirement obligation	5,100,000	5,000,000
Equity method investment, purchase price													$ 4,800,000
Earnings Per Share [Abstract]
Non-vested restricted stock awards excluded from basic earnings per share calculation (in shares)		200,000	400,000
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation	2,391,000	3,999,000	3,333,000