Balance Sheet Components - Components of Other Assets (Details) - USD ($)	Jan. 31, 2020	Jan. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Restricted cash	$ 0	$ 2,448,000
Deferred offering costs	0	3,261,000
Capitalized implementation costs	358,000	286,000
Other	1,293,000	1,160,000
Other assets	$ 1,651,000	$ 7,155,000