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Restructuring - Utilization of Restructuring Accruals (Details) - Employee Severance
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Restructuring Reserve [Roll Forward]  
Remaining accrual as of December 31, 2017 $ 254
Expense provision 0
Cash payments and other (122)
Change in estimates (7)
Remaining accrual as of March 31, 2020 $ 125