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Note 11 - Significant Transaction (Details Textual) - USD ($) $ in Thousands |  |  | 6 Months Ended
--- | --- | --- | ---
Oct. 20, 2021 | Oct. 18, 2021 | Sep. 30, 2021
Closure of Our Butler, New Jersey Facility [Member] |  |  |
Severance Costs |  |  | $ 77
Restructuring and Related Cost, Expected Cost Remaining |  |  | $ 70
Subsequent Event [Member] | Senior Secured Credit Agreement [Member] |  |  |
Proceeds from Lines of Credit, Total |  | $ 70,000 |
Agena [Member] | Subsequent Event [Member] |  |  |
Payments to Acquire Businesses, Gross | $ 300,000,000 |  |

X
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