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Employee benefit plans	3 Months Ended
Employee benefit plans	Mar. 31, 2020
Employee benefit plans
Employee benefit plans	14. Employee benefit plans The Company sponsors a 401(k) savings plan for its employees. The Company may make discretionary contributions for each 401(k) plan year. During the three months ended March 31, 2020 and 2019, the Company made contributions of $0.1 million and $0.1 million, respectively.