Balance Sheet Components - Other Noncurrent Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020
Balance Sheet Components [Abstract]
Accounts receivable, noncurrent	$ 22,950	$ 9,011
Equity investment	13,538	3,000
Convertible Note	5,000	0
Prepaid expenses, noncurrent	4,693	2,945
Indefinite-lived intangible assets	3,654	2,159
Intangible assets subject to amortization, net	3,146	0
Other	6,337	5,217
Other assets, noncurrent	$ 59,318	$ 22,332