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Investments (Details 1) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	$ 5,319,342	$ 7,905,227
Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	4,901,326	5,819,537
Long-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	418,016	2,085,690
Financial [Member] | Long-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	418,016	1,237,992
Financial [Member] | Corporate debt securities [Member] | Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	2,219,654	1,604,618
Financial [Member] | Commercial Paper [Member] | Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	349,741	1,197,730
Financial [Member] | Certificate of Deposit [Member] | Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total		403,438
Industrial [Member] | Long-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total		426,974
Industrial [Member] | Corporate debt securities [Member] | Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	1,171,982	2,264,934
Industrial [Member] | Commercial Paper [Member] | Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	748,781	348,817
Utility [Member] | Long-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total		420,724
Utility [Member] | Corporate debt securities [Member] | Short-term Investments [Member] | Recurring [Member] | Level-2 [Member]
Summary of fair value of investments measured on recurring basis
Fair value of investments measured on recurring basis, total	$ 411,168

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph a, f, g

-Article 7



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16383099&loc=d3e24584-111560

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