Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Assets (Parenthetical) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Accumulated amortization of capitalized costs	$ 1,400,000	$ 600,000
Impairment charges	$ 0	$ 0