Composition of certain financial statement captions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Jan. 31, 2024
Composition of Certain Financial Statements [Line Items]
Other current liabilities	$ 5,930		$ 5,875
Other long-term liabilities	1,448		2,857
Depreciation	3,524	$ 4,504
Capitalized cost of computer software	4,388	5,146
Capitalized computed software amortization	2,279	2,143
Amortization of intangible assets	870	343
Changes in goodwill balance	0
Goodwill, impairment loss	0	$ 0
Capitalized implementation costs	1,532		1,532
Capitalized implementation costs, accumulated amortization	$ 1,121		$ 1,021
Acquired technology
Composition of Certain Financial Statements [Line Items]
Finite-lived intangible assets, remaining amortization period	5 years 8 months 12 days		6 years
Customer relationship
Composition of Certain Financial Statements [Line Items]
Finite-lived intangible assets, remaining amortization period	12 years 2 months 12 days		12 years 4 months 24 days
License
Composition of Certain Financial Statements [Line Items]
Finite-lived intangible assets, remaining amortization period	12 years 7 months 6 days		12 years 9 months 18 days
Trademarks
Composition of Certain Financial Statements [Line Items]
Finite-lived intangible assets, remaining amortization period	14 years 3 months 18 days		14 years 6 months
Computer Equipment
Composition of Certain Financial Statements [Line Items]
Assets acquired under finance leases	$ 41,779		$ 35,250
Assets under finance lease, accumulated amortization	$ 28,883		$ 27,399