Note 10 - Equity Method Investment - TEL's Summarized Financial Information - Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue	$ 94,432	$ 104,838	$ 90,197
Operating Expenses	83,475	91,644	79,771
Operating Income	10,957	13,194	10,426
Net Income	$ 6,598	$ 9,061	$ 7,564