Revenue - Schedule of Allowance for Doubtful Accounts (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	$ 2,515
Provision	2,075
Recoveries/write-offs	(313)
Ending balance	4,327
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Loss [Line Items]
Ending balance	$ 50