Detail of Certain Balance Sheet Accounts (Details) (EnerTech [Member])	12 Months Ended
Sep. 30, 2014
EnerTech [Member]
Schedule of Equity Cost Investments [Line Items]
Cost Method Investments Additional Information	we held an investment in EnerTech Capital Partners II L.P.(“EnerTech), a private investment fund
Equity Method Investment, Ownership Percentage	2.21%

This serves as a place to record data that is not specified elsewhere in the taxonomy but is useful for readers of the financial statements as it relates to the details of cost method investments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596

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