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Share-Based Compensation (Narrative) (Details) - 2017 Plan [Member] - $ / shares
1 Months Ended 9 Months Ended
May 01, 2019
Apr. 30, 2019
Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares available for grant under Stock Incentive Plan     2,400,000
Restricted Stock Awards [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares issued 6,000,000 2,000,000 522,000
Weighted-average grant date fair value per share     $ 3.22