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NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Enterprise-Wide Disclosures |  |
Percentage of export sales to consolidated net sales | 13.00%nsys_PercentageOfExportSalesToConsolidatedSales | 12.00%nsys_PercentageOfExportSalesToConsolidatedSales
Total Net Sales | $ 112,041,650 us-gaap_SalesRevenueNet | $ 111,058,439 us-gaap_SalesRevenueNet
Net property and equipment | 10,888,717 us-gaap_PropertyPlantAndEquipmentNet | 11,037,160 us-gaap_PropertyPlantAndEquipmentNet
Other assets | 117,127 us-gaap_OtherAssets | 122,419 us-gaap_OtherAssets
United States |  |
Enterprise-Wide Disclosures |  |
Net property and equipment | 10,214,279 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US | 10,560,184 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US
Other assets | 109,401 us-gaap_OtherAssets / us-gaap_StatementGeographicalAxis = country_US | 114,693 us-gaap_OtherAssets / us-gaap_StatementGeographicalAxis = country_US
Mexico |  |
Enterprise-Wide Disclosures |  |
Net property and equipment | 822,881 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_MX | 476,976 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_MX
Other assets | 7,726 us-gaap_OtherAssets / us-gaap_StatementGeographicalAxis = country_MX | 7,726 us-gaap_OtherAssets / us-gaap_StatementGeographicalAxis = country_MX
Aerospace and Defense |  |
Enterprise-Wide Disclosures |  |
Total Net Sales | 14,869,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = nsys_AerospaceAndDefenseMember | 19,879,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = nsys_AerospaceAndDefenseMember
Medical/Life Sciences |  |
Enterprise-Wide Disclosures |  |
Total Net Sales | 41,402,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = nsys_MedicalMember | 35,429,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = nsys_MedicalMember
Industrial |  |
Enterprise-Wide Disclosures |  |
Total Net Sales | $ 55,771,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = nsys_IndustrialMember | $ 55,750,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = nsys_IndustrialMember

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