XML 34 R23.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Assets Held for Sale - Narrative (Details) | 1 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) a | Sep. 30, 2017 USD ($) a drydock
Long Lived Assets Held-for-sale [Line Items] |  |
Drydocks sold | drydock |  | 2
Disposal Group, Held-for-sale, Not Discontinued Operations |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Property, plant and equipment held for sale | $ 107,010,000 | $ 107,010,000
South Texas Fabrication Yards | Disposal Group, Held-for-sale, Not Discontinued Operations |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Property, plant and equipment held for sale | 104,507,000 | $ 104,507,000
Clean-up and repair related costs due to Hurricane Harvey | $ 265,000 |
Insurance deductible, percent | 3.00% | 3.00%
Insurance initial payment |  | $ 3,000,000
South Texas Fabrication Yards | Disposal Group, Held-for-sale, Not Discontinued Operations | Accrued Liabilities |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Accrual for future repairs | $ 2,700,000 | 2,700,000
South Texas Fabrication Yards | Disposal Group, Held-for-sale, Not Discontinued Operations | Maximum |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Insurance coverage | 25,000,000 | 25,000,000
South Texas Fabrication Yards | Disposal Group, Held-for-sale, Not Discontinued Operations | Minimum |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Insurance deductible, value | 500,000 | 500,000
Prospect Shipyard |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Loss on sale of assets |  | 259,000
Prospect Shipyard | Disposal Group, Held-for-sale, Not Discontinued Operations |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Property, plant and equipment held for sale | $ 2,503,000 | $ 2,503,000
Area of leased facility (in acres) | a | 35 | 35
Impairment of assets held for sale |  | $ 389,000
Prospect Shipyard | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Proceeds from sale of assets | $ 2,000,000 | $ 2,000,000

X
- Definition Accrual For Future Repairs + References No definition available. + Details
Name: | gifi_AccrualForFutureRepairs
Namespace Prefix: | gifi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Insurance Coverage + References No definition available. + Details
Name: | gifi_InsuranceCoverage
Namespace Prefix: | gifi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Insurance Deductible, Percent + References No definition available. + Details
Name: | gifi_InsuranceDeductiblePercent
Namespace Prefix: | gifi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Insurance Deductible, Value + References No definition available. + Details
Name: | gifi_InsuranceDeductibleValue
Namespace Prefix: | gifi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number Of Drydocks Sold + References No definition available. + Details
Name: | gifi_NumberOfDrydocksSold
Namespace Prefix: | gifi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds From Property Insurance Policy + References No definition available. + Details
Name: | gifi_ProceedsFromPropertyInsurancePolicy
Namespace Prefix: | gifi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_CostOfPropertyRepairsAndMaintenance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2473-110228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1107-107759 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 + Details
Name: | us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2611-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_LongLivedAssetsHeldForSaleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=gifi_SouthTexasFabricationYardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=gifi_ProspectShipyardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |