The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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LONG-TERM DEBT - 2021 Notes (Details)			3 Months Ended
LONG-TERM DEBT - 2021 Notes (Details)	Apr. 09, 2021 USD ($) $ / shares	Apr. 06, 2021 USD ($)	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)
Debt Instrument [Line Items]
Payments of debt-related costs			$ 93,000	$ 9,422,000
Series B Preferred Stock \| Series B Private Placement
Debt Instrument [Line Items]
Sale of stock, consideration received on transaction		$ 200,000,000
2021 Notes
Debt Instrument [Line Items]
Debt principal amount	$ 315,000,000
Coupon interest rate	0.25%
Convertible debt, conversion ratio		0.0161092
Convertible debt, conversion price (in dollars per share) \| $ / shares	$ 62.08
Payments of debt-related costs	$ 8,900,000
Effective interest rate (as a percent)			0.83%