Note 12 - Segment Information (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Number of Operating Segments	2
Number of Reportable Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 81,238	$ 89,654
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,200	$ 1,700