Note I - Commitments (Details Textual) $ in Millions	12 Months Ended
	Jun. 30, 2016 USD ($) ft²	Jun. 30, 2015 USD ($)
California [Member]
Operating Lease Facility Area	162,000
Lessee Leasing Arrangements, Operating Leases, Renewal Term	10 years
SWITZERLAND | Natural Alternatives International Europe SA [Member]
Operating Lease Facility Area	94,217
Lessee Leasing Arrangements, Operating Leases, Renewal Term	5 years
Lessee Leasing Arrangements, Operating Leases, Term of Contract	5 years
Operating Leases, Rent Expense, Net | $	$ 3.1	$ 3.0