Note 9 - Equity Method Investment - TEL's Summarized Financial Information - Income Statement (Details) - Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue	$ 25,221	$ 27,525
Cost of Sales	4,769	7,516
Operating Expenses	18,875	12,526
Operating Income	1,577	7,483
Net Income	$ (1,442)	$ 5,088