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Note P - Restructuring of Operations and Income From Extinguishment of Loan (Details Textual) $ in Thousands, SFr in Millions |  |  | 12 Months Ended | 18 Months Ended | 73 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Aug. 17, 2021 CHF (SFr) | Jun. 16, 2021 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2022 | Jun. 30, 2021 USD ($) | Jun. 30, 2019 USD ($)
Restructuring and Related Cost, Number of Positions Eliminated |  |  |  |  |  | 252 |
Restructuring Reserve, Ending Balance |  |  | $ 2,352 | $ 84 |  | $ 2,352 | $ 0
Restructuring and Related Cost, Expected Pre-tax Savings |  |  | 1,600 |  |  |  |
Restructuring Charges, Total |  |  | 7,377 | 5,138 |  | 15,515 |
Impairment of Long-Lived Assets to be Disposed of |  |  | 4,267 |  |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  |  | 8,200 | 0 |  |  |
Paycheck Protection Program CARES Act [Member] | Promissory Note [Member] |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  | $ 8,200 |  |  |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  |  | 8,200 |  |  |  |
Subsequent Event [Member] | SWITZERLAND |  |  |  |  |  |  |
Proceeds from Sale of Productive Assets, Total | SFr | SFr 0.6 |  |  |  |  |  |
Employee Severance [Member] |  |  |  |  |  |  |
Restructuring Reserve, Ending Balance |  |  | 2,200 |  |  | $ 2,200 |
Restructuring Charges, Total |  |  | $ 3,110 | $ 1,953 |  |  |
Forecast [Member] |  |  |  |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated |  |  |  |  | 23 |  |

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