Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Related Party Transactions [Abstract]
Accounts receivable related party	$ 1.6		$ 1.2
Revenue from related party	$ 1.9	$ 6.7

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant