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16. MAJOR SUPPLIERS (Details Narrative) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Major Suppliers Details Narrative |  |  |  |
Top five suppliers percentage raw materials supplied | 54.60% | 89.70% | 56.60% | 89.60%
Amount due top five suppliers | $ 5,689,387 | $ 4,487,708 | $ 5,689,387 | $ 4,487,708

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- Definition Custom Element. + References No definition available. + Details
Name: | gure_AmountDueTopFiveSuppliers
Namespace Prefix: | gure_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Custom Element. + References No definition available. + Details
Name: | gure_MajorSuppliersDetailsNarrativeAbstract
Namespace Prefix: | gure_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Custom Element. + References No definition available. + Details
Name: | gure_TopFiveSuppliersPercentageRawMaterialsSupplied
Namespace Prefix: | gure_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration