Fair Value Measurements (Schedule of Qualitative Information) (Details)	6 Months Ended
Mar. 31, 2019 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Valuation Methodology	Monte Carlo Simulation
Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated change of control dates	Dec. 31, 2021
Maximum [Member] \| Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	17.30
Maximum [Member] \| Measurement Input, Probability Of Change Of Control [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability of change of control	90.00%
Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated change of control dates	Dec. 01, 2019
Minimum [Member] \| Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	15.30
Minimum [Member] \| Measurement Input, Probability Of Change Of Control [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Probability of change of control	0.00%

Value of input used to measure derivative liability.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date that nonrecurring measurements were estimated, excluding reporting date, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- Definition

For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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Fair Value Assumptions, Probability Of Occurrence

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