Note E - Debt (Details Textual)	12 Months Ended
	Jun. 30, 2015 CHF (SFr)	Jun. 30, 2015 USD ($)	Feb. 19, 2007 CHF (SFr)	Feb. 19, 2007 USD ($)	Sep. 22, 2006 CHF (SFr)	Sep. 22, 2006 USD ($)
Maximum [Member]
Ratio of Indebtedness to Net Capital		1.25
Minimum [Member]
Line of Credit Covenant Number of Consecutive Days That Outstanding Balance Must Be Zero	30 days	30 days
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.75%	1.75%
Debt Instrument Basis Spread on Elected Fixed Rate Borrowing		1.75%
Natural Alternatives International Europe SA [Member] | Fixed Loans [Member]
Debt Prepayment Penalty Rate	0.10%	0.10%
Debt Pre Payment Penalty	SFr 1,000	$ 1,070
Natural Alternatives International Europe SA [Member]
Line of Credit Facility, Maximum Borrowing Capacity					SFr 1,300,000	$ 1,400,000
Line of Credit Facility Maximum Borrowing Capacity Annual Reduction					SFr 160,000	$ 171,000
Line of Credit Facility Maximum Amount Outstanding after Reduction			SFr 500,000	$ 535,000
Debt Instrument, Term	2 years	2 years
Debt Instrument, Interest Rate, Stated Percentage		5.00%
Line of Credit Facility, Maximum Borrowing Capacity		$ 5,000,000
Line of Credit Facility, Commitment Fee Amount		10,000
Net Income Required in Future for Income Covenant		750,000
Long-term Line of Credit		0
Long-term Debt, Percentage Bearing Variable Interest, Amount		100,000
Line of Credit Facility Outstanding Daily Balance During Period		0
Minimum Prepayment Amount Under Line of Credit		100,000
Line of Credit Facility, Current Borrowing Capacity		$ 5,500,000