Note 12 - Net Loss Per Share - Computation of Net Income (Loss) Allocated to Common Shareholders (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss)	$ 7,986	$ 1,923	$ 3,990	$ (1,483)
Less loss (income) allocated to RSUs	(80)	(28)	(40)	23
Net income (loss) allocated to common shareholders	$ 7,906	$ 1,895	$ 3,950	$ (1,460)