Note 17 - Employee Benefit Plans - (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Employee Compensation and Benefits	$ 1,800,000	$ 1,400,000	$ 967,000
Deferred Compensation Arrangement with Individual, Recorded Liability	2,600,000	2,700,000
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 408,000	$ 285,000	$ 256,000