Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Additional Information (Detail1)

v3.19.3.a.u2
Revenue Recognition - Additional Information (Detail1)
Dec. 31, 2019
Sep. 30, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01    
Contract With Customer Assets And Liabilities [Line Items]    
Revenue remaining performance obligation, expected timing of satisfaction, period  
Minimum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01    
Contract With Customer Assets And Liabilities [Line Items]    
Revenue remaining performance obligation percentage 55.00%  
Revenue remaining performance obligation, expected timing of satisfaction, period 1 year  
Minimum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01    
Contract With Customer Assets And Liabilities [Line Items]    
Revenue remaining performance obligation percentage 10.00%  
Revenue remaining performance obligation, expected timing of satisfaction, period 2 years  
Maximum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01    
Contract With Customer Assets And Liabilities [Line Items]    
Revenue remaining performance obligation percentage 60.00%  
Revenue remaining performance obligation, expected timing of satisfaction, period 1 year  
Maximum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01    
Contract With Customer Assets And Liabilities [Line Items]    
Revenue remaining performance obligation percentage 15.00%  
Revenue remaining performance obligation, expected timing of satisfaction, period 2 years