DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION - Financial Instruments on a Recurring Basis (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Available-for-sale-securities	$ 103,917
Fair value, recurring | Level 1 Inputs
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Totals	127,022	$ 68,647
Fair value, recurring | Level 1 Inputs | Money market funds
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Cash and cash equivalents	127,022	$ 68,647
Fair value, recurring | Level 2 Inputs
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Totals	103,917
Fair value, recurring | Level 2 Inputs | U.S. Treasury notes
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Available-for-sale-securities	94,700
Fair value, recurring | Level 2 Inputs | U.S. corporate debt security
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Available-for-sale-securities	$ 9,217