Note 13 - Net Income (Loss) Per Share - Computation of Net Income(Loss) Allocated to Common Shareholders (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income (loss)	$ 254	$ (3,344)	$ (3,406)	$ 3,656
Less loss (earnings) allocated to RSUs	(4)	85	56	(94)
Net income (loss) allocated to common shareholders	$ 250	$ (3,259)	$ (3,350)	$ 3,562