Note 2 - Ownership Interests and Advances - Schedule of Results of Operations (Details) - Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 30,482	$ 35,296	$ 70,650	$ 82,710
Gross profit	17,873	18,730	46,101	48,236
Net loss	$ (28,681)	$ (28,866)	$ (51,702)	$ (43,470)