Note 7 - Concentrations (Details Textual)	12 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Accounts Receivable [Member] | Distributor 1 [Member]
Concentration Risk, Percentage	28.00%	10.00%
Accounts Receivable [Member] | Distributor 2 [Member]
Concentration Risk, Percentage	14.00%	16.00%
Accounts Receivable [Member] | Distributor 3 [Member]
Concentration Risk, Percentage	12.00%
Accounts Receivable [Member] | Distributor 4 [Member]
Concentration Risk, Percentage	10.00%	14.00%
Accounts Receivable [Member] | Distributor 5 [Member]
Concentration Risk, Percentage		16.00%
Accounts Receivable [Member]
Number Of Major Distributors	4	4
Sales Revenue, Net [Member] | Distributor 1 [Member]
Concentration Risk, Percentage	15.00%	13.00%
Revenue, Net	$ 2,358,000	$ 2,102,000
Sales Revenue, Net [Member] | Other Distributors [Member]
Concentration Risk, Percentage	14.00%	14.00%
Revenue, Net	$ 2,303,000	$ 2,288,000
Sales Revenue, Net [Member]
Concentration Risk, Percentage	16.00%	12.00%
Revenue, Net	$ 2,549,000	$ 1,849,000
Cost of Goods, Total [Member] | Supplier Concentration Risk [Member]
Concentration Risk, Percentage	75.00%	72.00%
Number of Suppliers	3	2
Revenue, Net	$ 16,042,000	$ 15,987,000