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Note 2 - Acquisitions - Components of Fair Value of Acquisitions and Allocation of Purchase Price For Acquisition of Piazza Rosa Group (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2017
Dec. 31, 2017
Sep. 30, 2017
Mar. 31, 2018
Mar. 31, 2018
Mar. 31, 2017
Jun. 30, 2017
Total         $ 10,397 $ 153,815  
Goodwill       $ 254,703 254,703   $ 242,690
Piazza Rosa Group [Member]              
Cash payments $ 12,889     12,889      
Less: cash paid to satisfy acquired debt (2,833)   $ (2,800) (2,833)      
Total 10,056   10,100 10,056      
Other acquired assets 2,678   2,678 4,342 4,342    
Other acquired assets   $ 1,664          
Inventories 637   637 635 635    
Inventories   (2)          
Property, plant, and equipment 5,005 5,005 5,005 5,005    
Identifiable intangible assets 4,087   4,087 4,086 4,086    
Identifiable intangible assets   (1)          
Goodwill 6,218   6,218 4,575 4,575    
Goodwill   (1,643)   (1,600)      
Liabilities assumed (7,387) (7,387) (7,387) (7,387)    
Deferred taxes (1,182)   (1,182) (1,200) (1,200)    
Deferred taxes   (18)          
Total $ 10,056 $ 10,056 $ 10,056 $ 10,056