XML 18 R37.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note H - Segment Information (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Jun. 30, 2014
Note H - Segment Information (Details) [Line Items] |  |  |
Number of Reportable Segments |  |  | 3
Revenue, Net (in Dollars) | $ 18,695,000 | $ 17,155,000 |
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | Natural Alternatives International Europe Sa [Member] | Markets Outside the United States [Member] |  |  |
Note H - Segment Information (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 67.00% | 55.00% |
Natural Alternatives International Europe Sa [Member] | UNITED STATES |  |  |
Note H - Segment Information (Details) [Line Items] |  |  |
Revenue, Net (in Dollars) | 0 | 0 |
Markets Outside the United States [Member] |  |  |
Note H - Segment Information (Details) [Line Items] |  |  |
Revenue, Net (in Dollars) | 8,985,000 | 7,667,000 |
UNITED STATES |  |  |
Note H - Segment Information (Details) [Line Items] |  |  |
Revenue, Net (in Dollars) | $ 9,710,000 | $ 9,488,000 |

X
- Details
Name: | naii_NoteHSegmentInformationDetailsLineItems
Namespace Prefix: | naii_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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