Summary of Significant Accounting Policies (Concentrations of Credit Risk) (Details)	12 Months Ended
Sep. 30, 2013 Customer	Sep. 30, 2012 Customer
United States
Concentration Risk [Line Items]
Percentage Of Cash And Cash Equivalents	60.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Number Of Customers	2	2
Accounts Receivable [Member] \| Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%	14.00%
Accounts Receivable [Member] \| Customer Two
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%	12.00%
Accounts Receivable [Member] \| Yingli Green Energy
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%	14.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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