DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION - Financial Instruments on a Recurring Basis (Details) - USD ($) $ in Thousands	Jul. 31, 2023	Jan. 31, 2023
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Available-for-sale-securities	$ 59,992
Fair value, recurring | Level 1 Inputs
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Totals	127,064	$ 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	127,064	$ 68,647
Fair value, recurring | Level 2 Inputs
Fair value of assets and liabilities measured on recurring and nonrecurring basis
Available-for-sale-securities	59,992
Totals	$ 59,992