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CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables) | 12 Months Ended
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Jan. 31, 2024
CASH, CASH EQUIVALENTS AND INVESTMENTS |
Investments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2024 |  | 2023
Short-term investments | ​ | $ | 109,489 | ​ | $ | 151,511
Available-for-sale securities | ​ | ​ | 105,884 | ​ | ​ | —
Total investments | ​ | $ | 215,373 | ​ | $ | 151,511
Schedule of available-for-sale securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | January 31, 2024
​ | ​ | ​ | ​ | ​ | Allowance for | ​ | Gross | ​ | Gross | ​ | Estimated
​ | ​ | Amortized | ​ | Credit | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Losses |  | Gains |  | Losses |  | Value
U.S. Treasury notes: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Due in one to two years | ​ | $ | 50,634 | ​ | $ | — | ​ | $ | 305 | ​ | $ | 102 | ​ | $ | 50,837
Due in two to three years | ​ | ​ | 45,583 | ​ | ​ | — | ​ | ​ | 263 | ​ | ​ | 128 | ​ | ​ | 45,718
U.S. corporate debt security: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Due in two to three years | ​ | ​ | 9,406 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 77 | ​ | ​ | 9,329
Totals | ​ | $ | 105,623 | ​ | $ | — | ​ | $ | 568 | ​ | $ | 307 | ​ | $ | 105,884

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 321 -Publisher FASB -URI https://asc.fasb.org//321/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 325 -Publisher FASB -URI https://asc.fasb.org//325/tableOfContent + Details
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