Note 3 - Intangible Assets, Net (Details Textual) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			13 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			20 years
Amortization of Intangible Assets	$ 25,000	$ 34,000		$ 80,000	$ 103,000
Impairment of Intangible Assets, Finite-lived	$ 0	$ 0		$ 0	$ 0