Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jul. 01, 2019
Accounts Receivable, Credit Loss Expense (Reversal)	$ (100)	$ 500	$ 300
Construction in Progress, Gross	1,900	1,200
Contract with Customer, Asset, after Allowance for Credit Loss, Total	0
Contract with Customer, Liability, Total	300
Accounts Receivable, Allowance for Credit Loss, Ending Balance	700	1,300
Advertising Expense	5,000	5,100	5,200
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax, Total	300	100	200
Undistributed Earnings of Foreign Subsidiaries	67,900
Research and Development Expense, Total	$ 3,700	$ 3,600	$ 3,500
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total	68,378	23,771	32,674
Derivative Asset, Total	$ 0	$ 0
Subsequent Event [Member] | Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset				$ 6,300
Operating Lease, Liability, Total				$ 4,300
Prepaid Expenses and Other Current Assets [Member]
Contract with Customer, Right to Recover Product, Total	100
Accrued Expenses [Member]
Contract with Customer, Refund Liability, Total	$ 200
Noncompete Agreements [Member]
Finite-Lived Intangible Asset, Useful Life	8 years
Software Developement [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Minimum [Member] | Trademarks and Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life	14 years
Minimum [Member] | Completed Technology [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	8 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	20 years
Maximum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life	15 years
Maximum [Member] | Trademarks and Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life	20 years
Maximum [Member] | Completed Technology [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	16 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	10 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	50 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	12 years