Note 2 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		9 Months Ended
	Mar. 31, 2017 USD ($) shares	Mar. 31, 2016 USD ($) shares	Mar. 31, 2017 USD ($) shares	Mar. 31, 2016 USD ($) shares	Jun. 30, 2016 USD ($)
Number of Revenue Sources	5		5
Cash, FDIC Insured Amount	$ 250,000		$ 250,000
Cash, Uninsured Amount	6,852,000		6,852,000		$ 37,883,000
Depreciation	1,725,000	$ 1,603,000	5,122,000	$ 4,524,000
Research and Development Expense	$ 1,447,000	$ 1,562,000	$ 4,117,000	$ 4,193,000
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares | shares	297,000	893,000	853,000	846,000
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	$ 0		$ 0
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 0		$ 0
Minimum [Member]
Media Content Service Period			30 days
Finite-Lived Intangible Asset, Useful Life			7 years
Standard Warranty Term			1 year
Maximum [Member]
Media Content Service Period			1 year
Finite-Lived Intangible Asset, Useful Life			20 years
Standard Warranty Term			5 years
Maximum [Member] | Product Warranty Exceptions [Member]
Standard Warranty Term			10 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life			15 years