Note 2 - Ownership Interests In and Advances - Results of Operations (Details) - Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 39,388	$ 28,940	$ 119,270	$ 112,540
Gross profit	23,244	14,448	73,395	61,401
Net loss	$ (15,650)	$ (30,470)	$ (56,684)	$ (99,282)