Leases - Balance Sheet Components (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Finance Lease:
Property and equipment, net	$ 38,418	$ 39,411
Other accrued liabilities	4,698	4,633
Other liabilities, non-current	58,057	59,257
Operating Leases:
Operating lease right-of-use assets	32,965	11,147
Operating lease liabilities (current)	4,005	3,750
Operating lease liabilities, non-current	$ 29,625	$ 8,113