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401(k) Profit-Sharing Plan (Details Narrative) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2017 | Dec. 31, 2016
Defined contribution plan employer matching contribution percent for three percent of employee contribution |  | 100.00%
Defined contribution plan employer matching contribution percent for first compensation |  | 3.00%
Defined contribution plan employer matching contribution percent for two percent of employee contribution |  | 50.00%
Defined contribution plan employer matching contribution percent for next compensation |  | 2.00%
Contributions under profit sharing plan |  | $ 0
Subsequent Event [Member] |  |
Employer's matching contribution | 8.00% |
Employee's contribution for matching | 10.00% |
Participant's salary for employer matching | 0.80% |

X
- Definition Amount of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | nanx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Contribution Plan Employer Matching Contribution Percent For First Compensation Slab + References No definition available. + Details
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Namespace Prefix: | nanx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan Employer Matching Contribution Percent For Next Compensation Slab + References No definition available. + Details
Name: | nanx_DefinedContributionPlanEmployerMatchingContributionPercentForNextCompensationSlab
Namespace Prefix: | nanx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan Employer Matching Contribution Percent For Three Percent Of Employee Contribution + References No definition available. + Details
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Namespace Prefix: | nanx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan Employer Matching Contribution Percent For Two Percent Of Employee Contribution + References No definition available. + Details
Name: | nanx_DefinedContributionPlanEmployerMatchingContributionPercentForTwoPercentOfEmployeeContribution
Namespace Prefix: | nanx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |