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v2.4.1.9

NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Accounts Receivable and Allowance for Doubtful Accounts |  |
Allowance for doubtful accounts | 137,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 138,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Inventories |  |
Raw materials | 12,745,623 us-gaap_InventoryRawMaterials | 12,282,902 us-gaap_InventoryRawMaterials
Work in process | 3,653,670 us-gaap_InventoryWorkInProcess | 3,317,573 us-gaap_InventoryWorkInProcess
Finished goods | 2,861,373 us-gaap_InventoryFinishedGoods | 2,926,512 us-gaap_InventoryFinishedGoods
Reserve | (732,248)us-gaap_InventoryValuationReserves | (1,099,517)us-gaap_InventoryValuationReserves
Total | 18,528,418 us-gaap_InventoryNet | 17,427,470 us-gaap_InventoryNet
Property, Equipment and Depreciation |  |
Accumulated Depreciation | 20,827,645 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 18,943,393 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Net Property and Equipment | 10,888,717 us-gaap_PropertyPlantAndEquipmentNet | 11,037,160 us-gaap_PropertyPlantAndEquipmentNet
Land |  |
Property, Equipment and Depreciation |  |
Property and equipment | 375,000 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandMember | 375,000 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandMember
Building and Leasehold Improvements |  |
Property, Equipment and Depreciation |  |
Property and equipment | 9,184,710 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = nsys_BuildingAndLeaseholdImprovementsMember | 9,116,429 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = nsys_BuildingAndLeaseholdImprovementsMember
Buildings |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 39 years |
Leasehold improvements | Minimum |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 3 years |
Leasehold improvements | Maximum |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 15 years |
Manufacturing equipment |  |
Property, Equipment and Depreciation |  |
Property and equipment | 16,769,847 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember | 15,953,227 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember
Manufacturing equipment | Minimum |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 3 years |
Manufacturing equipment | Maximum |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 7 years |
Office and other equipment |  |
Property, Equipment and Depreciation |  |
Property and equipment | 5,386,805 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = nsys_OfficeAndOtherEquipmentMember | $ 4,535,897 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = nsys_OfficeAndOtherEquipmentMember
Office and other equipment | Minimum |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 3 years |
Office and other equipment | Maximum |  |
Property, Equipment and Depreciation |  |
Estimated useful lives | 7 years |

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