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Stock Incentive Plan - Summary of Nonvested RSUs (Details) - Restricted Stock Units (RSUs)
6 Months Ended
Jun. 30, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Shares, Outstanding, Beginning balance | shares 517,750,000
Shares, Granted | shares 206,377,000
Shares, Vested | shares (140,720,000)
Shares, Forfeited | shares (29,939,000)
Shares, Outstanding, Ending balance | shares 553,468,000
Weighted-Average Grant Date Fair Value, Outstanding, Beginning balance | $ / shares $ 2.42
Weighted-Average Grant Date Fair Value, Granted | $ / shares 1.71
Weighted-Average Grant Date Fair Value, Vested | $ / shares 2.42
Weighted-Average Grant Date Fair Value, Forfeited | $ / shares 2.42
Weighted-Average Grant Date Fair Value, Outstanding, Ending balance | $ / shares $ 2.16