Note 11 - Retirement Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 2,297	$ 1,829	$ 1,416
Maximum [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration