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Note 12 - Retirement Benefits (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Foreign Plan [Member]        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total $ 117 $ 258 $ 237 $ 512
Foreign Plan [Member] | U.K. Defined Benefit Plan [Member]        
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year 800   800  
Foreign Plan [Member] | Germany Defined Benefit Plan [Member]        
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year 300   300  
UNITED STATES        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 232 312 463 625
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year 200   200  
Pension Plan [Member]        
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year 1,300   1,300  
Defined Benefit Plan, Plan Assets, Contributions by Employer 300 300 500 500
Cooking Solutions Group [Member]        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total $ 0 $ 0 0 $ 0
Accounting Standards Update 2017-07 [Member] | Reclassification of Net Benefit Costs From Cost of Sales to Other Non-operating Expense [Member] | Quarter Ended December 31, 2018 [Member]        
Prior Period Reclassification Adjustment     100  
Accounting Standards Update 2017-07 [Member] | Reclassification of Net Benefit Costs From Cost of Sales to Other Non-operating Expense [Member] | Six Months Ended December 31, 2018 [Member]        
Prior Period Reclassification Adjustment     200  
Accounting Standards Update 2017-07 [Member] | Reclassification of Net Benefit Costs From Selling, General, and Administrative Expense to Other Non-operating Expense [Member] | Quarter Ended December 31, 2017 [Member]        
Prior Period Reclassification Adjustment     400  
Accounting Standards Update 2017-07 [Member] | Reclassification of Net Benefit Costs From Selling, General, and Administrative Expense to Other Non-operating Expense [Member] | Six Months Ended December 31, 2017 [Member]        
Prior Period Reclassification Adjustment     $ 800