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Note 2 - Summary of Significant Accounting Policies (Details Textual) | 3 Months Ended
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Sep. 30, 2016 USD ($) shares | Sep. 30, 2015 USD ($) shares
Minimum [Member] |  |
Media Content Service Period | 30 days |
Finite-Lived Intangible Asset, Useful Life | 7 years |
Standard Warranty Term | 1 year |
Maximum [Member] | Leasehold Improvements [Member] |  |
Property, Plant and Equipment, Useful Life | 15 years |
Maximum [Member] | Product Warranty Exceptions [Member] |  |
Standard Warranty Term | 10 years |
Maximum [Member] |  |
Media Content Service Period | 1 year |
Finite-Lived Intangible Asset, Useful Life | 20 years |
Standard Warranty Term | 5 years |
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset | $ 0 |
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability | $ 0 |
Number of Revenue Sources | 5 |
Cash, FDIC Insured Amount | $ 250,000 |
Cash, Uninsured Amount | 34,816,000 | $ 37,883,000
Depreciation | 1,728,000 | 1,450,000
Research and Development Expense | $ 1,401,000 | $ 1,311,000
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares | shares | 914,000 | 693,000

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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