Note 3 - Revenue 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 $ in Millions	Dec. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 186
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year