Leases - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2019	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Lessee Lease Description [Line Items]
Operating lease expense		$ 3.5	$ 3.0	$ 3.0
Weighted-average remaining lease term - operating leases		3 years 7 months 6 days
Weighted-average discount rate - operating leases		3.55%
Extended Office Lease [Member]
Lessee Lease Description [Line Items]
Increase to operating lease right-of-use assets		$ 4.4
Increase to operating lease liabilities		$ 4.4
Shanghai [Member] | Extended Office Lease [Member]
Lessee Lease Description [Line Items]
Inception date		Dec. 01, 2021
Expiration date		Nov. 30, 2024
Lease term		3 years
Shanghai [Member] | Additional Office Space [Member]
Lessee Lease Description [Line Items]
Expiration date		Nov. 30, 2024
Lease term		40 months
Commencement date		Aug. 01, 2021
Hong Kong [Member] | Extended Office Lease [Member]
Lessee Lease Description [Line Items]
Inception date		Dec. 01, 2021
Expiration date		Nov. 30, 2026
Lease term		5 years
Italy [Member] | Building [Member]
Lessee Lease Description [Line Items]
Leased property construction completion year	2024
Italy [Member] | Additional Office Space [Member] | Building [Member]
Lessee Lease Description [Line Items]
Lease term	35 years
Italy [Member] | Parma Lease [Member] | Building [Member]
Lessee Lease Description [Line Items]
Future undiscounted cash payments	$ 2.2
Future undiscounted cash payments in construction phase	1.8
Future undiscounted cash payments, paid in remainder of lease term	$ 0.4