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17. CUSTOMER CONCENTRATION (Details Narrative) (Top 5 customers, USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Top 5 customers |  |
Percent products sold to top five customers | 31.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CustomerConcentrationRiskMember | 39.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CustomerConcentrationRiskMember
Amounts due from major customers | $ 19,719,116 gure_AmountsDueFromMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CustomerConcentrationRiskMember | $ 19,258,917 gure_AmountsDueFromMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CustomerConcentrationRiskMember

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