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Note 6 - Goodwill - Changes to Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2021
Jun. 30, 2023
Balance     $ 267,906
Goodwill, Other Increase (Decrease)     (246)
Impairments     0
Translation adjustment     (2,839)
Balance     264,821
Electronics Products Group [Member]      
Balance     136,969
Goodwill, Other Increase (Decrease)     0
Impairments     0
Translation adjustment     (3,537)
Balance     133,432
Engraving Group [Member]      
Balance     76,250
Goodwill, Other Increase (Decrease)     0
Impairments     0
Translation adjustment     333
Balance     76,583
Scientific Group [Member]      
Balance     15,454
Goodwill, Other Increase (Decrease)     0
Impairments     0
Translation adjustment     0
Balance     15,454
Engineering Technologies Group [Member]      
Balance     35,928
Goodwill, Other Increase (Decrease)     0
Impairments $ (7,600) $ (7,600) 0
Translation adjustment     365
Balance     36,293
Specialty Solutions Group [Member]      
Balance     3,305
Goodwill, Other Increase (Decrease)     (246)
Impairments     0
Translation adjustment     0
Balance     $ 3,059