Note 13 - Employee Benefit Plans and Other (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0.7	$ 0.6
Other Current Liabilities [Member]
Employee-related Liabilities, Current, Total	$ 3.5	$ 2.1