Note 15 - Segment Information (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Number of Operating Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 147,107	$ 82,356	$ 343,091
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,200	$ 2,400	$ 5,600