Note 16 - Accumulated Other Comprehensive Income - Loss Reclassified From Accumulated Other Comprehensive Income (Loss) Into Earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Losses on cash flow swaps to:
Interest expense			$ (55)
Income tax benefit			21
Total reclassifications			$ (34)