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Note 1 - Summary of Accounting Policies (Details Textual) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Capitalized Computer Software, Amortization | $ 600 | $ 600 | $ 500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | $ 8,400 |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 0 | 0 | 0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Income Tax Expense (Benefit) | $ 15,355 | $ 16,295 | $ 20,874
Effective Income Tax Rate Reconciliation, Percent | 24.80% | 23.80% | 27.40%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | $ 400 |  |
Effective Income Tax Rate Reconciliation, Disposition of Asset, Amount |  | $ (900) |
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount | 600 | 700 | $ 500
Effective Income Tax Rate Reconciliation, Income Tax Rate Differential, Other Jurisdictions, Amount | (5,300) | (4,900) | (4,000)
Accounting Standards Update 2016-09 [Member] |  |  |
Income Tax Expense (Benefit) | (600) |  |
Selling, General and Administrative Expenses [Member] |  |  |
Advertising Expense | 5,100 | 4,300 | 5,000
Research and Development Expense | 5,500 | 4,900 | 4,100
20% Owned Equity Interest, Equity Method [Member] |  |  |
Payments to Suppliers | $ 2,400 | $ 3,300 | $ 2,100
Equity Method Investment, Ownership Percentage | 20.00% | 20.00% | 20.00%
Sales Revenue, Net [Member] |  |  |
Concentration Risk, Threshold Percentage | 5.00% |  |
Accounts Receivable [Member] |  |  |
Concentration Risk, Threshold Percentage | 5.00% |  |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |
Number of Major Customers | 0 |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Number of Major Customers | 0 |  |
Other Noncurrent Assets [Member] |  |  |
Trading Securities, Cost | $ 2,400 | $ 2,300 |

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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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