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DISCONTINUED OPERATIONS (Details) - Summary of Discontinued Operations (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Sep. 30, 2014
Assets of discontinued operations:    
Prepaid and other current assets $ 1,638us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets $ 1,624us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets
Other long-term assets 2,246us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets 2,126us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets
Total assets of discontinued operations 3,884gff_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrentAndNoncurrent 3,750gff_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrentAndNoncurrent
Liabilities of discontinued operations:    
Accrued liabilities, current 2,528us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities 3,282us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities
Other long-term liabilities 3,524us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities 3,830us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities
Total liabilities of discontinued operations $ 6,052gff_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrentAndNoncurrent $ 7,112gff_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrentAndNoncurrent