Note N - Subsequent Events (Details Textual) - Subsequent Event [Member] - Foreign Exchange Contract One [Member] - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] € in Millions	Jul. 19, 2018 EUR (€)
Derivative, Number of Instruments Held, Total	16
Derivative, Notional Amount	€ 52.6
Derivative, Average Forward Exchange Rate	1.21