Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock-based Compensation (Details Textual)

v3.20.2
Note 10 - Stock-based Compensation (Details Textual) - USD ($)
$ in Millions
6 Months Ended
May 05, 2020
Mar. 10, 2020
Jun. 03, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Subscription Rate       17.50%  
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares (in shares)       13,400,000  
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 Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount       $ 18.4  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 255 days  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       645,000 80,000
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 120 days 90 days      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   645,000 80,000    
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche One [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     90 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     40,000    
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Tranche Two [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 1 year 30 days   1 year