XML 36 R25.htm IDEA: XBRL DOCUMENT
v3.23.3

CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables) | 9 Months Ended
--- | ---
Oct. 31, 2023
CASH, CASH EQUIVALENTS AND INVESTMENTS |
Investments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | October 31, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Short-term investments | ​ | $ | 108,029 | ​ | $ | 151,511
Available-for-sale securities | ​ | ​ | 103,917 | ​ | ​ | —
Total investments | ​ | $ | 211,946 | ​ | $ | 151,511
Schedule of available-for-sale securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | October 31, 2023
​ | ​ | ​ | ​ | ​ | 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 | ​ | $ | 50,282 | ​ | $ | — | ​ | $ | 3 | ​ | $ | 357 | ​ | $ | 49,928
Due in two to three years | ​ | ​ | 45,514 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 742 | ​ | ​ | 44,772
U.S. corporate debt security: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Due in two to three years | ​ | ​ | 9,268 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 51 | ​ | ​ | 9,217
Totals | ​ | $ | 105,064 | ​ | $ | — | ​ | $ | 3 | ​ | $ | 1,150 | ​ | $ | 103,917

X
- References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_InvestmentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration