2.4.0.81091 - Disclosure - Income Taxes - Summary of Valuation Allowance (Detail)truefalsefalse1false USDfalsefalse$eol_PE5554----1320-F0004_STD_365_20130331_0http://www.sec.gov/CIK0001057708duration2012-04-01T00:00:002013-03-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$eol_PE5554----1320-F0004_STD_366_20120331_0http://www.sec.gov/CIK0001057708duration2011-04-01T00:00:002012-03-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$eol_PE5554----1320-F0004_STD_365_20110331_0http://www.sec.gov/CIK0001057708duration2010-04-01T00:00:002011-03-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 2us-gaap_ValuationAllowanceAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Valuation allowance:2false 3us-gaap_ValuationAllowanceAmountus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse51854045185404USD$falsetruefalse2truefalsefalse60575166057516USD$falsetruefalse3truefalsefalse45536874553687USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 false2Balance at beginning of fiscal year3false 3gai_DeferredTaxAssetsValuationAllowanceAdditionsgai_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse414756414756falsefalsefalse2truefalsefalse-993431-993431falsefalsefalse3truefalsefalse14161681416168falsefalsefalsexbrli:monetaryItemTypemonetaryDeferred tax assets valuation allowance additions.No definition available.false2Additions (reversals)4false 3gai_DeferredTaxAssetsValuationAllowanceForeignCurrencyTranslationAdjustmentsgai_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse157824157824falsefalsefalse2truefalsefalse121319121319falsefalsefalse3truefalsefalse8766187661falsefalsefalsexbrli:monetaryItemTypemonetaryDeferred tax assets valuation allowance foreign currency translation adjustments.No definition available.false2Exchange realignment5false 3us-gaap_ValuationAllowanceAmountus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse57579845757984USD$falsetruefalse2truefalsefalse51854045185404USD$falsetruefalse3truefalsefalse60575166057516USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 false2Balance at end of fiscal yearfalseIncome Taxes - Summary of Valuation Allowance (Detail) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://global-webpage.com/taxonomy/role/DisclosureIncomeTaxesSummaryOfValuationAllowance35