Note C - Revenue from Contracts with Customers 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01 $ in Thousands	Mar. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 100
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year