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WARRANTY LIABILITY (Details) | 12 Months Ended
--- | ---
Sep. 30, 2015
Telephonics [Member] | Minimum [Member] |
WARRANTY LIABILITY (Details) [Line Items] |
Product Warranty Period | 1 year
Telephonics [Member] | Maximum [Member] |
WARRANTY LIABILITY (Details) [Line Items] |
Product Warranty Period | 2 years
AMES [Member] |
WARRANTY LIABILITY (Details) [Line Items] |
Product Warranty Period | 90 days

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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | gff_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Period Type: |