Balance Sheet Components - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020	Jan. 31, 2021	Dec. 31, 2018
Balance Sheet Components [Line Items]
Amortization expense	$ 300,000	$ 300,000	$ 652,000	$ 652,000
Amortization expense for deferred sales commissions	1,400,000	$ 900,000	2,800,000	$ 1,700,000
Impairment loss in relation to deferred commission costs capitalized			0
Non-cancelable purchase commitments	12,000,000.0		12,000,000.0		$ 5,400,000
Global Telecom Corporation
Balance Sheet Components [Line Items]
Non-cancelable purchase commitments	$ 400,000		$ 400,000		$ 0
Global Telecom Corporation | Convertible Promissory Note
Balance Sheet Components [Line Items]
Investment in privately-held company						$ 1,300,000