Revenue - Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-01 $ in Thousands	Jul. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue to be recognized from remaining performance obligation	$ 0
Revenue to be recognized from remaining performance obligation, expected timing of satisfaction, period	1 year