Note E - Debt (Details)	1 Months Ended	6 Months Ended			6 Months Ended				6 Months Ended			6 Months Ended		6 Months Ended
	Dec. 31, 2010 USD ($)	Dec. 31, 2013 USD ($)	Dec. 16, 2010 USD ($)	Dec. 31, 2013 Natural Alternatives International Europe Sa [Member] Current Account Loans [Member]	Dec. 31, 2013 Natural Alternatives International Europe Sa [Member] Fixed Loans [Member] USD ($)	Dec. 31, 2013 Natural Alternatives International Europe Sa [Member] Fixed Loans [Member] CHF	Feb. 19, 2007 Natural Alternatives International Europe Sa [Member] Amended Line of Credit Facility [Member] USD ($)	Feb. 19, 2007 Natural Alternatives International Europe Sa [Member] Amended Line of Credit Facility [Member] CHF	Dec. 31, 2013 Natural Alternatives International Europe Sa [Member]	Sep. 22, 2006 Natural Alternatives International Europe Sa [Member] USD ($)	Sep. 22, 2006 Natural Alternatives International Europe Sa [Member] CHF	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Minimum [Member]
Note E - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 5,000,000							$ 1,500,000	1,300,000
Line of Credit Facility, Commitment Fee Amount	12,500
Net Income Required In Future For Income Covenant		750,000
Ratio of Indebtedness to Net Capital													1.25	1.0
Long-term Debt, Percentage Bearing Variable Interest, Amount		100,000
Debt Instrument, Basis Spread on Variable Rate												2.75%
Debt Instrument Basis Spread On Elected Fixed Rate Borrowing												2.50%
Line Of Credit Facility Outstanding Daily Balance During Period		0
LineOfCreditCovenantNumber Of Consecutive Days That Outstanding Balance Must Be Zero														30 days
Minimum Prepayment Amount Under Line Of Credit		100,000
Line Of Credit Facility Maximum Borrowing Capacity Annual Reduction (in Francs)										180,000	160,000
Line Of Credit Facility Maximum Borrowing Capacity Annual Reduction										180,000	160,000
Line Of Credit Facility Maximum Amount Outstanding After Reduction (in Francs)							561,000	500,000
Line Of Credit Facility Maximum Amount Outstanding After Reduction							561,000	500,000
Debt Instrument, Term									24 years
Debt Instrument, Interest Rate, Stated Percentage				5.00%
Debt Prepayment Penalty Rate					0.10%	0.10%
Debt Pre Payment Penalty (in Francs)					1,123	1,000
Debt Pre Payment Penalty					1,123	1,000
Line of Credit Facility, Current Borrowing Capacity		$ 5,600,000