Note 10 - Equity - Summary of Stock-based Compensation and Unrecognized Compensation (Details) - Phantom Restricted Stock Award [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Stock-based compensation expense		$ 1,811	$ 2,092
Remaining expense to be recognized, if all vesting conditions are met(1)	[1]	$ 4,142	$ 6,640
Weighted average remaining contractual term (in years) (Year)		1 year 9 months 18 days	2 years 2 months 12 days

[1] Does not include an estimate for projected future dividends.