Note 12 - Benefit Plan (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		3.00%
Defined Contribution Plan, Cost	$ 600,000	$ 700,000
Defined Contribution Plan, Administrative Expense	$ 28,000	$ 19,000