Note 12 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	12.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 50,000	$ 53,000
Bonus Percentage	5.00%
Accrued Bonuses, Current	$ 695,000	1,063,000
President [Member]
Bonus, Maximum Threshold	1,000,000
Accrued Bonuses, Current	$ 231,000	$ 447,000
For Employees Contributing 1 Percent of Gross Earnings [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	0.50%
For Employees Contributing 2 to12 Percent of Gross Earnings [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	1.00%