Restricted Stock Units (RSUs) (Restricted Stock Unit Vesting) (Details) - Restricted Stock Units (RSUs) [Member]	Jun. 30, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	793,250
2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	302,750
2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	176,250
2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting in future period	314,250