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Business Segmentation and Geographical Distribution - Additional Information (Detail) (Non-Domestic Revenue [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Non-Domestic Revenue [Member]
Revenue from External Customer [Line Items]
Revenue from international sources	$ 375us-gaap_Revenues / us-gaap_StatementGeographicalAxis = nanx_NondomesticRevenueMember	$ 111us-gaap_Revenues / us-gaap_StatementGeographicalAxis = nanx_NondomesticRevenueMember

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ 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 210.5-03.1)

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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