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Note 6 - Goodwill - Changes to Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Jun. 30, 2021
Balance   $ 271,221
Acquisitions   13,991
Impairments   (7,600)
Translation adjustment   442
Balance   278,054
Electronics Products Group [Member]    
Balance   131,582
Acquisitions   13,991
Impairments   0
Translation adjustment   (741)
Balance   144,832
Engraving Group [Member]    
Balance   77,195
Acquisitions   0
Impairments   0
Translation adjustment   183
Balance   77,378
Scientific Group [Member]    
Balance   15,454
Acquisitions   0
Impairments   0
Translation adjustment   0
Balance   15,454
Engineering Technologies Group [Member]    
Balance   43,685
Acquisitions   0
Impairments $ (7,600) (7,600)
Translation adjustment   1,000
Balance   37,085
Specialty Solutions Group [Member]    
Balance   3,305
Acquisitions   0
Impairments   0
Translation adjustment   0
Balance   $ 3,305