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Operations and summary of significant accounting policies (Schedule of property, plant, and equipment useful lives) (Details) | 12 Months Ended
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Sep. 30, 2014
Enterprise Resource Planning system [Member] |
Property, Plant and Equipment, Useful Life | 10 years
Minimum [Member] | Land Improvements [Member] |
Property, Plant and Equipment, Useful Life | 3 years
Minimum [Member] | Building and Building Improvements [Member] |
Property, Plant and Equipment, Useful Life | 3 years
Minimum [Member] | Leasehold Improvements [Member] |
Property, Plant and Equipment, Useful Life | 1 year
Minimum [Member] | Machinery and Production Equipment [Member] |
Property, Plant and Equipment, Useful Life | 3 years
Minimum [Member] | Computer Equipment and Software [Member] |
Property, Plant and Equipment, Useful Life | 2 years
Minimum [Member] | Office furniture and equipment [Member] |
Property, Plant and Equipment, Useful Life | 3 years
Minimum [Member] | Other Capitalized Property Plant and Equipment [Member] |
Property, Plant and Equipment, Useful Life | 3 years
Maximum [Member] | Land Improvements [Member] |
Property, Plant and Equipment, Useful Life | 40 years
Maximum [Member] | Building and Building Improvements [Member] |
Property, Plant and Equipment, Useful Life | 40 years
Maximum [Member] | Leasehold Improvements [Member] |
Property, Plant and Equipment, Useful Life | 25 years
Maximum [Member] | Machinery and Production Equipment [Member] |
Property, Plant and Equipment, Useful Life | 15 years
Maximum [Member] | Computer Equipment and Software [Member] |
Property, Plant and Equipment, Useful Life | 10 years
Maximum [Member] | Office furniture and equipment [Member] |
Property, Plant and Equipment, Useful Life | 13 years
Maximum [Member] | Other Capitalized Property Plant and Equipment [Member] |
Property, Plant and Equipment, Useful Life | 13 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration