Concentrations Risk of Company's Purchases and Outstanding Accounts Payable Balances (Detail) (USD $)
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3 Months Ended |
Mar. 31, 2015
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Mar. 31, 2014
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Concentration Risk [Line Items] |
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Purchases |
$ 883,303us-gaap_CostOfGoodsSold |
$ 1,235,521us-gaap_CostOfGoodsSold |
Major Supplier Concentration Risk | Accounts Payable |
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Concentration Risk [Line Items] |
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Accounts payable |
945,215us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember |
146,410us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember |
Major Supplier Concentration Risk | Purchases |
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Concentration Risk [Line Items] |
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Purchases |
630,986us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember |
492,201us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember |
Percentage of purchases |
54.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember |
35.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember |
Major Supplier Concentration Risk | Vendors C | Accounts Payable |
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Concentration Risk [Line Items] |
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Accounts payable |
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0us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember / us-gaap_MajorCustomersAxis = nfec_VendorThreeMember |
Major Supplier Concentration Risk | Vendors C | Purchases |
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Concentration Risk [Line Items] |
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Purchases |
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144,521us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorThreeMember |
Percentage of purchases |
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10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorThreeMember |
Major Supplier Concentration Risk | Vendor E | Accounts Payable |
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Concentration Risk [Line Items] |
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Accounts payable |
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122,521us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember / us-gaap_MajorCustomersAxis = nfec_VendorFiveMember |
Major Supplier Concentration Risk | Vendor E | Purchases |
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Concentration Risk [Line Items] |
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Purchases |
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210,905us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorFiveMember |
Percentage of purchases |
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15.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorFiveMember |
Major Supplier Concentration Risk | Vendor F | Accounts Payable |
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Concentration Risk [Line Items] |
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Accounts payable |
383,350us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember / us-gaap_MajorCustomersAxis = nfec_VendorSixMember |
23,889us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember / us-gaap_MajorCustomersAxis = nfec_VendorSixMember |
Major Supplier Concentration Risk | Vendor F | Purchases |
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Concentration Risk [Line Items] |
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Purchases |
270,204us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorSixMember |
136,775us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorSixMember |
Percentage of purchases |
23.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorSixMember |
10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorSixMember |
Major Supplier Concentration Risk | Vendor J | Accounts Payable |
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Concentration Risk [Line Items] |
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Accounts payable |
425,035us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember / us-gaap_MajorCustomersAxis = nfec_VendorsTenMember |
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Major Supplier Concentration Risk | Vendor J | Purchases |
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Concentration Risk [Line Items] |
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Purchases |
236,888us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorsTenMember |
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Percentage of purchases |
20.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorsTenMember |
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Major Supplier Concentration Risk | Vendor K | Accounts Payable |
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Concentration Risk [Line Items] |
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Accounts payable |
136,830us-gaap_AccountsPayableCurrent / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_AccountsPayableMember / us-gaap_MajorCustomersAxis = nfec_VendorsElevenMember |
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Major Supplier Concentration Risk | Vendor K | Purchases |
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Concentration Risk [Line Items] |
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Purchases |
$ 123,894us-gaap_CostOfGoodsSold / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorsElevenMember |
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Percentage of purchases |
11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = nfec_MajorSupplierConcentrationRiskMember / us-gaap_MajorCustomersAxis = nfec_VendorsElevenMember |
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