Revenues - Schedule of Revenue Recognized Over Remaining Life of Contract (Detail) $ in Thousands	Nov. 02, 2019 USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Signing bonus	$ 500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-11-03
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Signing bonus	$ 35
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-02-02
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Signing bonus	$ 141
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-31
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Signing bonus	$ 365
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period