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Stock-Based Compensation - Schedule of Non-vested Balance of Restricted Stock (Details) - Restricted Stock [Member]
Jun. 30, 2019
shares
Nonvested balance, 2019 (July 1, 2019 to December 31, 2019) 377,525
Nonvested balance, 2020 265,785
Nonvested balance, 2021 250,660