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Note 11 - Commitments and Contingencies (Details Textual) | 12 Months Ended
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Dec. 31, 2002
Officers [Member] |
Disability and Life Insurance Plans, Period (Year) | 3 years
Other Participants Except Officers [Member] |
Disability and Life Insurance Plans, Period (Year) | 2 years

X
- Definition Represents the period of continued participation in health, disability and life insurance plans for the participants in the event of an involuntarily termination. + References No definition available. + Details
Name: | nsys_DisabilityAndLifeInsurancePlansPeriod
Namespace Prefix: | nsys_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=nsys_OfficersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=nsys_OtherParticipantsExceptOfficersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |