Note 11 - 401(k) Savings Plan (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Defined Contribution Plan, Cost	$ 0.5	$ 0.5
First 3% of Each Participant's Contributions [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	100.00%
Second Two Percent Of Each Participants Contributions [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%