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Share-Based Compensation	9 Months Ended
Share-Based Compensation	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Compensation	Share-Based Compensation During the nine months ended September 30, 2021, the Company granted 3,754,228 restricted stock units and performance stock units to certain employees some of which will vest over a period of three or four years, and some of which will vest based on achievement of performance criteria. The criteria for the performance stock unit awards is based on the achievement of key milestones based on the Company's performance. During the nine months ended September 30, 2020, the Company awarded 1,920,000 options to certain employees and non-employees, which will vest over a period of four years. The estimated grant date fair value of the options granted during the nine months ended September 30, 2020 totaled $0.4 million. Share-based compensation expense for the three and nine months ended September 30, 2021 was $0.5 million and $4.0 million, respectively. Share-based compensation expense for the three and nine months ended September 30, 2020 was $0.1 million and $0.2 million, respectively.