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Note 12 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 21, 2022
Jul. 01, 2021
Mar. 31, 2022
Dec. 31, 2021
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount     $ 38.7 $ 42.7
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)     30,436,528  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)     15,711,223  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value     $ 64.3  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value     $ 49.8  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)     713,810  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value     $ 2.7  
Share-Based Payment Arrangement, Expense     $ 0.2  
Share-Based Payment Arrangement, Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     4 years  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)     10 years  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)     3,592,504  
Restricted Stock Units (RSUs) [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     4,159,532  
Earn-Out RSUs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)   4 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)   10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Fair Value   $ 2.5    
The 2021 Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     41,772,571  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 689,409      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value $ 1.9      
The 2021 Plan [Member] | Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     4 years  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)     10 years  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)     $ 5.88  
Share-Based Payment Arrangement, Expense     $ 3.7  
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount     $ 66.6