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Revenue - Additional Information (Details 1)
Sep. 30, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01  
Disaggregation Of Revenue [Line Items]  
Remaining performance obligations, percentage 55.00%
Remaining performance obligations, expected satisfaction period 12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-10-01  
Disaggregation Of Revenue [Line Items]  
Remaining performance obligations, percentage 45.00%
Remaining performance obligations, expected satisfaction period 12 months