Note 13 - Segment Information (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Number of Operating Segments			2
Revenue from Contract with Customer, Including Assessed Tax	$ 64,507	$ 1,019	$ 81,555	$ 81,991
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,000	$ 0	$ 1,100	$ 2,200