Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Revenue Recognition - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 12,999
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 11,581
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 514
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 426
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 210
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 99
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Disaggregation of Revenue [Line Items]  
Revenue, Remaining Performance Obligation $ 169
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction 1 year