Leases - Additional Information (Details) $ in Millions	9 Months Ended
	Oct. 31, 2020 USD ($) FinanceLease	Oct. 31, 2019 USD ($)
Lessee Lease Description [Line Items]
Finance lease agreements term	4 years
Sublease expiration year	2025
Number of finance leases not yet commenced | FinanceLease	2
Finance leases not yet commenced, description	These finance leases are expected to commence during the fourth quarter of fiscal year 2021 and as such, we did not reflect these leases on the condensed consolidated balance sheet as of October 31, 2020 and in the tables above.
Operating lease not yet commenced, description	We did not have any operating leases that have not yet commenced as of October 31, 2020.
Other Long-term Liabilities
Lessee Lease Description [Line Items]
Asset retirement obligation | $	$ 3.1	$ 2.8
Minimum
Lessee Lease Description [Line Items]
Operating lease expiration year	2022
Total lease term of sublease arrangement	11 months
Finance leases has not yet commenced lease term	1 year
Maximum
Lessee Lease Description [Line Items]
Operating lease expiration year	2029
Total lease term of sublease arrangement	96 months
Finance leases has not yet commenced lease term	3 years