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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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Amount of expense for amortization of capitalized computer software costs.

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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.

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