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Commitments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended | 1 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 CALIFORNIA sqft | Jun. 30, 2013 Natural Alternatives International Europe Sa SWITZERLAND sqft | Jul. 31, 2013 Subsequent Event CALIFORNIA
Commitments [Line Items] |  |  |  |  |
Area of manufacturing facility leased |  |  | 162,000 | 59,239 |
Operating lease expiry date |  |  |  | 2022-12 | 2024-03
Operating lease extended term |  |  |  |  | 10 years
Rental expense | $ 2.2 | $ 2.5 |  |  |

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- Definition Lease Expiration, Month and Year + References No definition available. + Details
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- Definition Operating Lease Facility Area + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + 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 + Details
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