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Note 1 - Summary of Accounting Policies (Details Textual) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
Other Noncurrent Assets [Member] |  |  |
Trading Securities, Cost | $ 2.3 | $ 2.3 |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |
Number of Major Customers | 0 |  |
Sales Revenue, Net [Member] |  |  |
Concentration Risk, Threshold Percentage | 5.00% |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |
Number of Major Customers | 0 |  |
Accounts Receivable [Member] |  |  |
Concentration Risk, Threshold Percentage | 5.00% |  |
20% Owned Equity Interest, Equity Method [Member] |  |  |
Payments to Suppliers | $ 3.3 | 2.1 | $ 1.6
Equity Method Investment, Ownership Percentage | 20.00% |  |
Selling, General and Administrative Expenses [Member] |  |  |
Advertising Expense | $ 4.3 | 5.0 | 4.6
Research and Development Expense | $ 4.9 | $ 4.1 | $ 4.8
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 0 | 0 | 0
Capitalized Computer Software, Amortization | $ 0.6 | $ 0.5 | $ 0.4
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |

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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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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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