Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Additional Information (Detail1)

v3.19.1
Revenue Recognition - Additional Information (Detail1)
Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01  
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: 2019-04-01  
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: 2020-04-01  
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: 2019-04-01  
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: 2020-04-01  
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