Supporting Financial Information - Other Income (Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest expense, net	$ (25)us-gaap_InterestExpense	$ (29)us-gaap_InterestExpense	$ (49)us-gaap_InterestExpense	$ (51)us-gaap_InterestExpense
Amortization of deferred financing costs	0us-gaap_AmortizationOfFinancingCosts	0us-gaap_AmortizationOfFinancingCosts	0us-gaap_AmortizationOfFinancingCosts	(10)us-gaap_AmortizationOfFinancingCosts
Change in value of financial instruments	0	0	0	99
Miscellaneous other income (expense), net	(626)us-gaap_OtherNonoperatingIncome	1us-gaap_OtherNonoperatingIncome	(638)us-gaap_OtherNonoperatingIncome	1us-gaap_OtherNonoperatingIncome
Other income (expense) net	(651)us-gaap_NonoperatingIncomeExpense	(28)us-gaap_NonoperatingIncomeExpense	(687)us-gaap_NonoperatingIncomeExpense	39us-gaap_NonoperatingIncomeExpense
Settlement of retroactive payment claim, net			(629)us-gaap_LossContingencyLossInPeriod	0us-gaap_LossContingencyLossInPeriod
Unfavorable Regulatory Action \| Department of Labor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Settlement of retroactive payment claim, net	$ (629)

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Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 45

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

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-Section 03

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-Article 5

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

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Amount of the cost of borrowed funds accounted for as interest expense.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

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-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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-Section S99

-Paragraph 2

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The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.

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