Note 11 - Equity-based Compensation - Stock Option Exercises (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Proceeds from issuance of common stock upon stock option exercises		$ 0	$ 956	$ 0
Total intrinsic value of stock option exercises (1)	[1]		129
Tax expense (benefit) of stock option exercises recorded in income tax expense			312	$ (1,556)
Aggregate intrinsic value of outstanding stock options			0
Aggregate intrinsic value of exercisable stock options			$ 0

[1] Calculation was based on a weighted average market price of the Company's stock at the time of exercise of $20.55 for the year ended December 31, 2019.