Note 7 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)	Sep. 30, 2016	Jun. 30, 2016
Customer Relationships [Member]
Finite Lived Intangible Assets, Gross	$ 9,316,000	$ 9,316,000
Accumulated Amortization	7,654,000	7,581,000
Net Amount	1,662,000	1,735,000
Patents [Member]
Finite Lived Intangible Assets, Gross	338,000	338,000
Accumulated Amortization	163,000	154,000
Net Amount	175,000	184,000
Technology-Based Intangible Assets [Member]
Finite Lived Intangible Assets, Gross	11,228,000	11,228,000
Accumulated Amortization	11,008,000	10,989,000
Net Amount	220,000	239,000
Trade Names [Member]
Finite Lived Intangible Assets, Gross	460,000	460,000
Accumulated Amortization	460,000	460,000
Noncompete Agreements [Member]
Finite Lived Intangible Assets, Gross	710,000	710,000
Accumulated Amortization	710,000	704,000
Net Amount		6,000
Trademarks and Trade Names [Member]
Indefinite Lived Intangible Assets	3,422,000	3,422,000
Total Indefinite-lived Intangible Assets	3,422,000	3,422,000
Finite Lived Intangible Assets, Gross	22,052,000	22,052,000
Accumulated Amortization	19,995,000	19,888,000
Net Amount	2,057,000	2,164,000
Indefinite Lived Intangible Assets	3,422,000	3,422,000
Total Indefinite-lived Intangible Assets	3,422,000	3,422,000
Total Other Intangible Assets	25,474,000	25,474,000
Intangible Assets, Net (Excluding Goodwill)	$ 5,479,000	$ 5,586,000