Note 8 - Debt (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

		Fair Value of
Derivatives Not Designated as Hedging Instruments	Balance Sheet Location	Derivatives
		December 31, 2018
Interest rate swap assets - current	Other current assets	$	44

Derivative Instruments, Gain (Loss) [Table Text Block]

Derivatives Not Designated as	Location of Gain(Loss) Recognized in Net	Amount of Gain(Loss) Recognized
Hedging Instruments	Income on Derivatives	in Net Income on Derivatives
		Year ended December 31,
		2018		2019
Interest rate swaps	Interest expense	$	201	$	(44	)