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v2.4.1.9

Property, Plant and Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | ---
Jun. 10, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 09, 2013
Operating Leased Assets [Line Items] |  |  |  |  |
Lease agreement expenses |  | $ 5.6 us-gaap_LeaseAndRentalExpense | $ 9.5 us-gaap_LeaseAndRentalExpense | $ 7.7 us-gaap_LeaseAndRentalExpense |
Office space area of leased premises | 4,421 gifi_OfficeSpaceArea |  |  |  |
Lease commencement period | Aug. 01, 2013 |  |  |  |
Lease agreement period | 64 months |  |  |  |
Extension of lease period | 5 years |  |  |  |
Operating Lease Amendment [Member] |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Office space area of leased premises |  |  |  |  | 3,624 gifi_OfficeSpaceArea / us-gaap_LossContingenciesByNatureOfContingencyAxis = gifi_OperatingLeaseAmendmentMember
Lease expiration date |  |  |  |  | Jan. 31, 2020

X
- Definition Lease Agreement Period + References No definition available. + Details
Name: | gifi_LeaseAgreementPeriod
Namespace Prefix: | gifi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lease Commencement Date + References No definition available. + Details
Name: | gifi_LeaseCommencementDate
Namespace Prefix: | gifi_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lease Extension Period + References No definition available. + Details
Name: | gifi_LeaseExtensionPeriod
Namespace Prefix: | gifi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Office Space Area + References No definition available. + Details
Name: | gifi_OfficeSpaceArea
Namespace Prefix: | gifi_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_LeaseExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OperatingLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=gifi_OperatingLeaseAmendmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |