Revenues by Geography, Concentration of Credit Risk and Remaining Performance Obligations - Additional Information 1 (Detail) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01 |
Sep. 30, 2019 |
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Disaggregation Of Revenue [Line Items] | |
Percentage of remaining performance obligations on which revenue is expected to be recognized | 35.00% |
Unearned income recognition period | 12 months |