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Subsequent Events	12 Months Ended
	Jan. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Between February 1, 2021 and March 30, 2021, we received conversion notices on our 2023 Notes for $12.8 million in aggregate principal amount, for which we elected to settle the principal amount in cash during the three months ended April 30, 2021 and for $6.6 million in aggregate principal amount, for which we elected to settle the principal amount in cash in the three months ended July 31, 2021. During that period, we also settled the $23.9 million of 2023 Notes for which conversion was elected prior to January 31, 2021, for aggregate consideration of $72.3 million, consisting of $23.9 million in cash and 0.2 million shares of our common stock with a value of $48.4 million.

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No definition available.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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