Business Combinations - Schedule of Intangible Assets Acquired and Expected Lives for Finite-Lived Intangible Assets (Detail) $ in Thousands	Apr. 30, 2021 USD ($)
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 1,983
Customer Relationships [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 787
Finite-lived intangible assets useful life	5 years
Trade Names [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 639
Finite-lived intangible assets useful life	5 years
Technology [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 438
Finite-lived intangible assets useful life	5 years
Non-compete Covenant [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 69
Finite-lived intangible assets useful life	3 years
Exclusive-Right [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 44
Finite-lived intangible assets useful life	5 years
Backlog [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 6
Finite-lived intangible assets useful life	less than 1 year