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v3.3.1.900

Property, Plant and Equipment - Additional Information (Detail) ft² in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) ft² | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Operating Leased Assets [Line Items] |  |  |
Lease agreement expenses | $ | $ 5.9 | $ 5.6 | $ 9.5
Office space area of leased premises | ft² | 8 |  |
Operating Lease Amendment [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Lease expiration date | Jan. 31, 2020 |  |

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
- 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. + 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: |