Basis of Presentation - Concentrations of Credit Risk (Details)	3 Months Ended	6 Months Ended
Mar. 31, 2013 Accounts Receivable [Member] Customers	Mar. 31, 2013 Accounts Receivable [Member] Customer One [Member]	Mar. 31, 2013 Accounts Receivable [Member] Customer Two [Member]	Mar. 31, 2013 Accounts Receivable [Member] Customer Three [Member]	Mar. 31, 2013 UNITED STATES Cash and Cash Equivalents and Restricted Cash [Member]
Concentration Risk [Line Items]
Number of customers	3
Concentration risk, percentage		13.00%	13.00%	12.00%	50.00%

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 275

-SubTopic 10

-Section 50

-Paragraph 18

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

Reference 2: 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 3: 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 4: 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

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Balance Type:	na
Period Type:	duration