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SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION (Tables) | 9 Months Ended
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Oct. 31, 2023
SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION |
Schedule of other current assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | October 31, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Income tax refunds receivable and prepaid income taxes | ​ | $ | 16,550 | ​ | $ | 15,327
Raw materials inventory | ​ | ​ | 12,449 | ​ | ​ | 11,903
Prepaid expenses | ​ |  | 6,106 | ​ |  | 4,541
Other | ​ | ​ | 6,138 | ​ | ​ | 6,563
Total other current assets | ​ | $ | 41,243 | ​ | $ | 38,334
Schedule of accrued expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | October 31, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Accrued project costs | ​ | $ | 52,719 | ​ | $ | 17,448
Accrued compensation | ​ | ​ | 17,921 | ​ | ​ | 18,286
Lease liabilities | ​ | ​ | 1,447 | ​ | ​ | 1,567
Other | ​ | ​ | 11,106 | ​ | ​ | 12,566
Total accrued expenses | ​ | $ | 83,193 | ​ | $ | 49,867

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