Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Effective Income Tax Rate Before Discretion, at Federal Statutory Income Tax Rate, Percent		21.00%	28.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 800	$ 300	$ 1,300
Deferred Tax Liabilities, Previously Undistributed Foreign Earnings		2,100
Estimated Income Tax Liability for Undistributed Foreign Earnings		1,800
Effective Income Tax Rate Reconciliation, Anticipated Cash Repatriation, Amount		2,100	7,800
Effective Income Tax Rate Reconciliation, Section 965 Toll Tax, Amount		800	11,700
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount				$ 600
Effective Income Tax Rate Reconciliation, Income Tax Rate Differential, Other Jurisdictions, Amount				(5,300)
Income Tax Expense (Benefit), Total		18,424	38,904	$ 11,822
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		10,400
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		100	$ 100
Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit), Total		200
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total		68,500
Tax Credit Carryforward, Amount		2,700
Foreign Tax Authority [Member]
Operating Loss Carryforwards, Total		3,800
Foreign Tax Authority [Member] | Indefinite Lived [Member]
Operating Loss Carryforwards, Total		2,800
Foreign Tax Authority [Member] | Ten Years [Member]
Operating Loss Carryforwards, Total		1,000
Deferred Tax Related to Sale Of Cooking Solutions Group [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 6,300