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Note 1 - Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended
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Jun. 30, 2016 USD ($) shares | Jun. 30, 2015 USD ($) shares | Jun. 30, 2014 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 | 37,883,000 | $ 28,494,000 |
Depreciation | 6,171,000 | 5,804,000 | $ 5,411,000
Defined Contribution Plan, Cost Recognized | 2,327,000 | 1,880,000 | 1,961,000
Research and Development Expense | 5,549,000 | 5,598,000 | 8,226,000
Advertising Expense | $ 288,000 | $ 305,000 | $ 322,000
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares | shares | 872,000 | 451,000 | 462,000

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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