COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
COMMITMENTS AND CONTINGENCIES
Rent expense	$ 687,000	$ 759,000
Operating Leases
2014	395,000
2015	189,000
2016	8,000
Total	592,000
2002 Plan
Commitment and contingencies
Period of graded vesting schedule	5 years
Annual vesting by the participants (as a percent)	20.00%
Expenses incurred	333,000	341,000
2002 Plan \| Officer participants
Commitment and contingencies
Bonus to be paid as a percentage of the participants base annual salary	15.00%
2002 Plan \| Other participants
Commitment and contingencies
Bonus to be paid as a percentage of the participants base annual salary	10.00%
Agreement(s) \| Maximum
Commitment and contingencies
Professional outplacement services that would be received by the participants	$ 10,000
Agreement(s) \| Officer participants
Commitment and contingencies
Period of continued participation in health, disability and life insurance plans after involuntary termination	3 years
Agreement(s) \| Other participants
Commitment and contingencies
Period of continued participation in health, disability and life insurance plans after involuntary termination	2 years

Represents the annual vesting percentage of participants under the plan of the entity.

No definition available.

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- Definition

Represents the amount of bonus to be paid as a percentage of the participants' base annual salary.

+ References

No definition available.

+ Details

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- Details

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- 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

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- Definition

Represents the period of graded vesting schedule in which the participants vest under the plan of the entity.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of professional outplacement services that would be received by the participants in the event of an involuntarily termination.

+ References

No definition available.

+ Details

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Namespace Prefix:	nsys_
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- Details

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

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- Definition

Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

+ Details

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- Definition

Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

+ Details

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- Definition

Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

+ Details

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- Definition

Amount of payroll tax expense, compensation, postemployment and benefit-related expenses not elsewhere specified in the taxonomy (such as health plan, profit sharing, incentives, tuition reimbursement, other fringe benefits and perquisites) incurred in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration