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Significant Customers and Contingencies - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Revenue, Major Customer [Line Items] |  |
Number of major customers | 3nanx_MajorCustomersNumberOfCustomers |
Accounts receivable | 388,000us-gaap_AccountsReceivableNetCurrent | 52,000us-gaap_AccountsReceivableNetCurrent
Customers One [Member] |  |
Revenue, Major Customer [Line Items] |  |
Accounts receivable | 54,000us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = nanx_CustomersOneMember | (308,000)us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = nanx_CustomersOneMember
Customers One [Member] | Customer Concentration Risk [Member] | Sales [Member] |  |
Revenue, Major Customer [Line Items] |  |
Revenue from top customers | 72.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesMember / us-gaap_MajorCustomersAxis = nanx_CustomersOneMember | 72.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesMember / us-gaap_MajorCustomersAxis = nanx_CustomersOneMember
Customers Two [Member] |  |
Revenue, Major Customer [Line Items] |  |
Accounts receivable | 0us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = nanx_CustomersTwoMember | 0us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = nanx_CustomersTwoMember
Customers Two [Member] | Customer Concentration Risk [Member] | Sales [Member] |  |
Revenue, Major Customer [Line Items] |  |
Revenue from top customers | 6.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesMember / us-gaap_MajorCustomersAxis = nanx_CustomersTwoMember | 3.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesMember / us-gaap_MajorCustomersAxis = nanx_CustomersTwoMember
Customers Three [Member] |  |
Revenue, Major Customer [Line Items] |  |
Accounts receivable | 47,000us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = nanx_CustomersThreeMember | 46,000us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = nanx_CustomersThreeMember
Customers Three [Member] | Customer Concentration Risk [Member] | Sales [Member] |  |
Revenue, Major Customer [Line Items] |  |
Revenue from top customers | 5.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesMember / us-gaap_MajorCustomersAxis = nanx_CustomersThreeMember | 6.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesMember / us-gaap_MajorCustomersAxis = nanx_CustomersThreeMember
BASF [Member] |  |
Revenue, Major Customer [Line Items] |  |
Supply agreements with BASF Corporation | The financial condition covenants in one of our supply agreements with BASF “trigger” a technology transfer right (license and equipment sale at BASF’s option) in the event (a) that earnings for the twelve month period ending with our most recently published quarterly financial statements are less than zero and our cash, cash equivalents and certain investments are less than $1 million, or (b) of an acceleration of any debt maturity having a principal amount of more than $10 million. |
Minimum contractual covenant - net earnings previous twelve months | 0nanx_ContractualObligationNetEarningsPreviousTwelveMonths / us-gaap_MajorCustomersAxis = nanx_BasfMember |
Net book value equipment | 115.00%nanx_EquipmentSaleToNetBookValuePercentage / us-gaap_MajorCustomersAxis = nanx_BasfMember |
BASF [Member] | Maximum [Member] |  |
Revenue, Major Customer [Line Items] |  |
Cash, cash equivalents and investments, maximum | 1,000,000us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_MajorCustomersAxis = nanx_BasfMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
BASF [Member] | Minimum [Member] |  |
Revenue, Major Customer [Line Items] |  |
Principal amount of debt on maturity, minimum | 10,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_MajorCustomersAxis = nanx_BasfMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Original book value of equipment, Minimum | 30.00%nanx_EquipmentSaleToOriginalBookValuePercentage / us-gaap_MajorCustomersAxis = nanx_BasfMember / us-gaap_RangeAxis = us-gaap_MinimumMember |

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- Definition Minimum net earnings required to be realized under covenants found in a supply, purchase or debt contract + References No definition available. + Details
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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Excluding long-term commitments, description of arrangements in which the entity must commit resources to supply goods or services to one or more customers, which may include identification of the goods or services to be furnished, identity of the buyer, pricing, effects on pricing (such as penalties) of failing to deliver minimum quantities required to be furnished, cancellation rights, and termination provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 25 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a)(19)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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