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Share-Based Compensation - Restricted Stock Awards (Details) - Restricted stock awards
3 Months Ended 9 Months Ended
Sep. 30, 2019
shares
Sep. 30, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted (in shares) 607,000 607,000
Granted fair value (per share) | $ / shares   $ 0.72
Unvested (in shares) 607,000 607,000
Forfeited (in shares)   0