Note F - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 5,100,000
Foreign Tax Authority [Member] | Earliest Tax Year [Member] | Swiss Federal Tax Administration (FTA) [Member]
Open Tax Year	2013
Foreign Tax Authority [Member] | Natural Alternatives International Europe SA [Member]
Effective Income Tax Rate Reconciliation, Percent	18.70%
Natural Alternatives International Europe SA [Member]
Net Income (Loss) Attributable to Parent	$ 2,700,000
Undistributed Earnings of Foreign Subsidiaries	17,800,000
Federal, State and Local Income Tax Expense (Benefit), Gross, Continuing Operations	3,600,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(193,000)
Federal, State and Local Income Tax Expense Benefit, Continuing Operations	$ 3,400,000
Effective Income Tax Rate Reconciliation, Percent	29.70%	22.30%
Net Income (Loss) Attributable to Parent	$ 9,546,000	$ 3,346,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	34.00%