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REVENUES FROM CONTRACT WITH CUSTOMERS - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Disaggregation of Revenues
Totals	$ 392,206	$ 238,997	$ 482,153
United States
Disaggregation of Revenues
Totals	340,615	169,299	371,609
United Kingdom
Disaggregation of Revenues
Totals	37,836	49,028	81,319
Republic of Ireland
Disaggregation of Revenues
Totals	13,638	20,342	28,352
Other
Disaggregation of Revenues
Totals	$ 117	$ 328	$ 873

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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