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Note O - Subsequent Events (Details Textual) - Foreign Exchange Contract [Member] - Cash Flow Hedging [Member] € in Millions, SFr in Millions, $ in Millions | Sep. 07, 2022 CHF (SFr) | Aug. 16, 2022 CHF (SFr) | Jul. 21, 2022 EUR (€) | Jun. 30, 2022 USD ($) | Jun. 30, 2022 EUR (€)
--- | --- | --- | --- | --- | ---
Derivative, Notional Amount |  |  |  | $ 37.7 | € 31.9
Subsequent Event [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Derivative, Notional Amount | SFr 12.0 | SFr 7.5 | € 5.9 |  |
Derivative, Average Forward Exchange Rate | 0.9735 | 0.9477 | 1.030 |  |

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