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Lease Commitments - Additional Information (Detail) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2014 Lease | Dec. 31, 2014 | Dec. 31, 2013 Lease
Operating Leased Assets [Line Items] |  |  |
Rent Expense |  | $ 658,000us-gaap_LeaseAndRentalExpense | $ 653,000us-gaap_LeaseAndRentalExpense
Cost of equipment under capital lease |  | 272,000us-gaap_CapitalLeasedAssetsGross |
Accumulated depreciation |  | 29,000us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation |
Number of capital leases | 1nanx_NumberOfCapitalLeases |  | 0nanx_NumberOfCapitalLeases
Capital lease term | 3 years |  |
Payments to acquire capital lease | 184,000us-gaap_PaymentsToAcquireEquipmentOnLease |  |
Romeoville Illinois [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Operating lease number of renewals |  | 1nanx_OperatingLeaseNumberOfRenewals / us-gaap_LeaseArrangementTypeAxis = nanx_RomeovilleIllinoisMember |
Operating lease extension period |  | 5 years |
Monthly rent on lease amounts |  | 29,000us-gaap_OperatingLeasesRentExpenseMinimumRentals / us-gaap_LeaseArrangementTypeAxis = nanx_RomeovilleIllinoisMember |
Burr Ridge Facility [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Operating lease number of renewals |  | 1nanx_OperatingLeaseNumberOfRenewals / us-gaap_LeaseArrangementTypeAxis = nanx_BurrRidgeFacilityMember |
Operating lease extension period |  | 1 year |
Monthly rent on lease amounts |  | 13,000us-gaap_OperatingLeasesRentExpenseMinimumRentals / us-gaap_LeaseArrangementTypeAxis = nanx_BurrRidgeFacilityMember |
Offsite Warehouse [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Monthly rent on lease amounts |  | $ 5,000us-gaap_OperatingLeasesRentExpenseMinimumRentals / us-gaap_LeaseArrangementTypeAxis = nanx_OffsiteWarehouseMember |

X
- Definition Lessee leasing arrangements capital leases term of contract. + References No definition available. + Details
Name: | nanx_LesseeLeasingArrangementsCapitalLeasesTermOfContract
Namespace Prefix: | nanx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Capital Leases + References No definition available. + Details
Name: | nanx_NumberOfCapitalLeases
Namespace Prefix: | nanx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Lease Number Of Renewals + References No definition available. + Details
Name: | nanx_OperatingLeaseNumberOfRenewals
Namespace Prefix: | nanx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735 + Details
Name: | us-gaap_CapitalLeasedAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
Name: | us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_OperatingLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34039-112682 + Details
Name: | us-gaap_OperatingLeasesRentExpenseMinimumRentals
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for payments to acquire rented equipment which is recorded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireEquipmentOnLease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nanx_BurrRidgeFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nanx_OffsiteWarehouseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nanx_RomeovilleIllinoisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |