Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Jan. 31, 2021	Jun. 30, 2019	Jan. 31, 2019
Liability:
Net carrying amount	$ 914,994	$ 897,525
0.375% Convertible Senior Notes Due 2026
Liability:
Principal	1,380,000	1,380,000
Unamortized debt discount and issuance costs	(465,006)	(482,475)
Net carrying amount	914,994	897,525
Carrying amount of the equity component	501,053	501,053
0.125% Convertible Senior Notes Due 2025
Liability:
Principal	804,997	804,999	$ 805,000
Unamortized debt discount and issuance costs	(193,811)	(203,638)
Net carrying amount	611,186	601,361
Carrying amount of the equity component	246,966	246,966
0.375% Convertible Senior Notes Due 2023
Liability:
Principal	5,877	8,832		$ 230,000
Unamortized debt discount and issuance costs	(663)	(1,125)
Net carrying amount	5,214	7,707
Carrying amount of the equity component	$ 1,544	$ 1,560