Note 1 - Description of Business and Basis of Presentation (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Jun. 30, 2022
Unrealized Gain (Loss) on Derivatives	$ (392)	$ 442
Options Held [Member]
Derivative, Underlying Investment, Shares (in shares)	95,400			207,970
Derivative, Underlying Investment, Fair Value	$ 1,600		$ 1,800	$ 3,600
Open Option Contracts, Expiration Period (Month)				24 months
Derivative, Underlying Investment, Shares, Expirations in Period (in shares)	37,524
Increase (Decrease) in Derivative Liabilities	$ (600)
Unrealized Gain (Loss) on Derivatives	$ (400)	$ 400