Retirement Plan	12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]
Retirement Plan	Retirement PlanThe Company has a 401(k) defined contribution plan for the benefit for all US employees and permits voluntary contributions by employees subject to IRS-imposed limitations. Effective January 1, 2018, the Company matched 100% of eligible employee contributions on the first 4% of employee salary (up to the IRS maximum). Employer contributions for the year ended December 31, 2019, 2018 and 2017 were $2.8 million, $2.2 million and $0.8 million, respectively. In 2017, the Company matched 100% of eligible employee contributions on the first 3% of employee salary (up to the IRS maximum).

Retirement Plan

12 Months Ended

Dec. 31, 2019

Retirement PlanThe Company has a 401(k) defined contribution plan for the benefit for all US employees and permits voluntary contributions by employees subject to IRS-imposed limitations. Effective January 1, 2018, the Company matched 100% of eligible employee contributions on the first 4% of employee salary (up to the IRS maximum). Employer contributions for the year ended December 31, 2019, 2018 and 2017 were $2.8 million, $2.2 million and $0.8 million, respectively. In 2017, the Company matched 100% of eligible employee contributions on the first 3% of employee salary (up to the IRS maximum).