Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Share-based Compensation and Cash-based Incentive Compensation - Schedule of Outstanding Restricted Stock Units Issued to Eligible Employees (Details)

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Note 9 - Share-based Compensation and Cash-based Incentive Compensation - Schedule of Outstanding Restricted Stock Units Issued to Eligible Employees (Details) - Restricted Stock Units (RSUs) [Member] - shares
Sep. 30, 2019
Dec. 31, 2018
Awards expected to vest (in shares) 3,270,661 3,355,917
Vesting in 2019 [Member]    
Awards expected to vest (in shares) 1,485,510  
Vesting in 2020 [Member]    
Awards expected to vest (in shares) 852,535  
Vesting in 2021 [Member]    
Awards expected to vest (in shares) 932,616