Note 11 - Derivatives - Derivative Instruments (Details) - Interest Rate Swap [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Other Noncurrent Liabilities [Member]
Derivatives, notional amount		$ 25,683
Derivatives, fair value	[1]	$ (661)
Other Assets [Member]
Derivatives, notional amount			$ 28,821
Derivatives, fair value	[1]		$ (603)

[1] See Note 13 for the fair value measurements related to these financial instruments.