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Note H - Segment Information - Net Sales by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014
Net sales | $ 19,613 us-gaap_SalesRevenueNet | $ 19,127 us-gaap_SalesRevenueNet | $ 56,926 us-gaap_SalesRevenueNet | $ 52,757 us-gaap_SalesRevenueNet
UNITED STATES |  |  |  |
Net sales | 11,857 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 8,992 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 30,941 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 26,695 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Markets Outside the United States [Member] |  |  |  |
Net sales | $ 7,756 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = naii_MarketsOutsideTheUnitedStatesMember | $ 10,135 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = naii_MarketsOutsideTheUnitedStatesMember | $ 25,985 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = naii_MarketsOutsideTheUnitedStatesMember | $ 26,062 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = naii_MarketsOutsideTheUnitedStatesMember

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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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