Note 14 - Equity Incentive Plan and Stock Based Compensation (Details Textual)	Feb. 25, 2020 shares
Non-qualified Stock Units to Non-employee Directors Annually or Upon Election [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized	1,000
Non-qualified Stock Units to Non-employee Directors, Quarterly [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized	1,000
The 2020 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized	500,000