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14. BUSINESS SEGMENTS (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |
Net revenue (external customers) | $ 113,660,331 us-gaap_Revenues | $ 118,391,783 us-gaap_Revenues
Net revenue (intersegment) | 3,013,295 gure_NetRevenueIntersegment | 2,947,350 gure_NetRevenueIntersegment
Income (loss) from operations before taxes | 23,818,221 us-gaap_OperatingIncomeLoss | 28,443,493 us-gaap_OperatingIncomeLoss
Income taxes | 6,226,015 us-gaap_IncomeTaxExpenseBenefit | 7,607,683 us-gaap_IncomeTaxExpenseBenefit
Income (loss) from operations after taxes | 17,592,206 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes | 20,835,810 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes
Total assets | 322,982,152 gure_TotalAssets | 309,244,805 gure_TotalAssets
Depreciation and amortization | 27,642,222 gure_DepreciationAndAmortizationSegmentNote | 27,460,693 gure_DepreciationAndAmortizationSegmentNote
Capital expenditures | 6,538,611 us-gaap_PropertyPlantAndEquipmentAdditions | 3,192,681 us-gaap_PropertyPlantAndEquipmentAdditions
Write-off/Impairment |  | 27,964 us-gaap_AssetImpairmentCharges
Bromine Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue (external customers) | 57,949,824 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 60,488,886 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Net revenue (intersegment) | 3,013,295 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 2,947,350 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Income (loss) from operations before taxes | 9,500,428 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 13,152,092 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Income taxes | 2,214,988 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 3,459,256 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Income (loss) from operations after taxes | 7,285,440 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 9,692,836 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Total assets | 195,539,637 gure_TotalAssets / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 181,490,011 gure_TotalAssets / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Depreciation and amortization | 18,011,790 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 17,384,351 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Capital expenditures | 5,414,738 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember | 2,780,023 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Write-off/Impairment |  | 24,503 us-gaap_AssetImpairmentCharges / us-gaap_ProductOrServiceAxis = gure_BromineSegmentMember
Crude Salt Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue (external customers) | 10,752,226 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 13,790,128 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Net revenue (intersegment) | 0 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 0 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Income (loss) from operations before taxes | 719,226 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 3,831,272 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Income taxes | 370,974 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 785,879 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Income (loss) from operations after taxes | 348,252 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 3,045,393 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Total assets | 51,632,485 gure_TotalAssets / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 61,138,301 gure_TotalAssets / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Depreciation and amortization | 6,076,042 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 6,547,844 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Capital expenditures | 1,123,873 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember | 406,586 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Write-off/Impairment |  | 3,247 us-gaap_AssetImpairmentCharges / us-gaap_ProductOrServiceAxis = gure_CrudeSaltSegmentMember
Chemical Products Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue (external customers) | 44,958,281 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 44,112,769 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Net revenue (intersegment) | 0 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 0 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Income (loss) from operations before taxes | 14,432,851 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 13,371,119 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Income taxes | 3,640,053 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 3,362,548 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Income (loss) from operations after taxes | 10,792,798 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 10,008,571 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Total assets | 75,748,241 gure_TotalAssets / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 66,479,395 gure_TotalAssets / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Depreciation and amortization | 3,554,390 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 3,528,498 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Capital expenditures | 0 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember | 6,072 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Write-off/Impairment |  | 214 us-gaap_AssetImpairmentCharges / us-gaap_ProductOrServiceAxis = gure_ChemicalProductsSegmentMember
Segment Total [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue (external customers) | 113,660,331 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 118,391,783 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Net revenue (intersegment) | 3,013,295 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 2,947,350 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Income (loss) from operations before taxes | 24,652,505 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 30,354,483 us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Income taxes | 6,226,015 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 7,607,683 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Income (loss) from operations after taxes | 18,426,490 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 22,746,800 gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Total assets | 322,920,363 gure_TotalAssets / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 309,107,707 gure_TotalAssets / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Depreciation and amortization | 27,642,222 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 27,460,693 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Capital expenditures | 6,538,611 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember | 3,192,681 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Write-off/Impairment |  | 27,964 us-gaap_AssetImpairmentCharges / us-gaap_ProductOrServiceAxis = us-gaap_OperatingSegmentsMember
Corporate [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue (external customers) | 0 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | 0 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Net revenue (intersegment) | 0 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | 0 gure_NetRevenueIntersegment / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Income (loss) from operations before taxes | (834,284)us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | (1,910,990)us-gaap_OperatingIncomeLoss / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Income taxes | 0 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | 0 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Income (loss) from operations after taxes | (834,284)gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | (1,910,990)gure_IncomeLossFromContinuingOperationsAfterIncomeTaxes / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Total assets | 61,789 gure_TotalAssets / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | 137,098 gure_TotalAssets / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Depreciation and amortization | 0 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | 0 gure_DepreciationAndAmortizationSegmentNote / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Capital expenditures | 0 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember | 0 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember
Write-off/Impairment |  | $ 0 us-gaap_AssetImpairmentCharges / us-gaap_ProductOrServiceAxis = us-gaap_CorporateMember

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