STOCKHOLDERS' EQUITY - Restricted Stock (Details) - $ / shares	12 Months Ended
Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Restricted Stock Units (RSUs)
Awards Outstanding
Unvested, beginning balance	1,393,268	242,943	281,825
Granted	326,791	1,280,664	142,594
Vested	(201,260)	(107,917)	(168,781)
Canceled	(2,650)	(22,422)	(12,695)
Unvested, ending balance	1,516,149	1,393,268	242,943
Weighted Average Grant Date Fair Value
Unvested, beginning balance	$ 12.47	$ 37.95	$ 34.56
Granted	31.52	10.25	37.74
Vested	20.43	37.96	32.32
Canceled	33.46	39.41	35.09
Unvested, ending balance	$ 15.48	$ 12.47	$ 37.95
Performance Shares [Member]
Awards Outstanding
Unvested, beginning balance	466,830	1,058,710	1,539,794
Granted	176,212		332,651
Vested	(125,934)	(279,053)	(810,655)
Canceled		(312,827)	(3,080)
Unvested, ending balance	517,108	466,830	1,058,710
Weighted Average Grant Date Fair Value
Unvested, beginning balance	$ 34.17	$ 36.15	$ 30.15
Granted	31.43		35.77
Vested	30.23	32.43	24.58
Canceled		42.41	42.41
Unvested, ending balance	$ 34.20	$ 34.17	$ 36.15

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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-Publisher FASB
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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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