Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Fair Value Accounting (Fair Value Measurement) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Assets:
Cash and cash equivalents	$ 147,576	$ 20,687	$ 18,144	$ 16,104
Restricted cash	407	1,482
Liabilities:
Warrant liability	86us-gaap_DerivativeLiabilitiesCurrent	122us-gaap_DerivativeLiabilitiesCurrent
Recurring
Assets:
Cash and cash equivalents	147,576	20,687
Restricted cash	407	1,482
Liabilities:
Warrant liability	86	122
Recurring \| Level 1 Quoted Prices in Active Markets for Identical Assets
Assets:
Cash and cash equivalents	147,576	20,687
Restricted cash	407	1,482
Liabilities:
Warrant liability	0	0
Recurring \| Level 2 Significant Other Observable Remaining Inputs
Assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Liabilities:
Warrant liability	86	122
Recurring \| Level 3 Significant Unobservable Inputs
Assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Liabilities:
Warrant liability	$ 0	$ 0