Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction (Detail)

v3.19.2
Revenue Recognition - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction (Detail)
$ in Thousands
Jun. 30, 2019
USD ($)
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 11,803
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 10,437
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 month
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 381
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 month
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 475
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 month
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 230
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 month
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 117
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 month
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 163
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 month