Balance Sheet Components - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022	Dec. 31, 2018
Balance Sheet Components [Line Items]
Amortization expense	$ 400,000	$ 300,000	$ 698,000	$ 652,000
Amortization expense for deferred sales commissions	1,800,000	1,400,000	3,600,000	2,800,000
Impairment loss in relation to deferred commission costs capitalized	0	$ 0	0	$ 0
Convertible note receivable	1,865,000		1,865,000		$ 1,773,000
Non-cancelable inventory purchase commitments	20,700,000		20,700,000		$ 19,400,000
Global Telecom Corporation
Balance Sheet Components [Line Items]
Convertible note receivable	1,900,000		1,900,000
Non-cancelable inventory purchase commitments	$ 0		0
Payment for inventory purchases and related costs			$ 2,300,000
Global Telecom Corporation | Convertible Promissory Note
Balance Sheet Components [Line Items]
Investment in privately-held company						$ 1,300,000