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Note 9 - Benefit Plans (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 28, 2022
May 08, 2020
Apr. 28, 2014
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Jul. 01, 2022
Apr. 27, 2022
May 07, 2020
Defined Contribution Plan, Cost       $ 0.4 $ 0.3 $ 1.0 $ 0.7      
The 2014 Long-Term Incentive Plan [Member]                    
Share Based Compensation Arrangement By Share Based Payment Award, Term (Year)     10 years              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)     2,253,735              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)       423,268   423,268        
The 2018 Omnibus Incentive Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)   4,607,389               1,607,389
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)   3,000,000                
The 2020 Plan Amendment [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 9,607,389               4,607,389  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 5,000,000                  
The 2020 Plan Amendment [Member] | Subsequent Event [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)               9,607,389