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SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION (Tables) | 6 Months Ended
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Jul. 31, 2023
SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION |
Schedule of other current assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | July 31, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Income tax refunds receivable and prepaid income taxes | ​ | $ | 16,895 | ​ | $ | 15,327
Raw materials inventory | ​ | ​ | 12,836 | ​ | ​ | 11,903
Prepaid expenses | ​ |  | 6,848 | ​ |  | 4,541
Other | ​ | ​ | 6,859 | ​ | ​ | 6,563
Total other current assets | ​ | $ | 43,438 | ​ | $ | 38,334
Schedule of accrued expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | July 31, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Accrued compensation | ​ | $ | 13,085 | ​ | $ | 18,286
Accrued project costs | ​ | ​ | 43,995 | ​ | ​ | 17,448
Lease liabilities | ​ | ​ | 1,535 | ​ | ​ | 1,567
Other | ​ | ​ | 9,005 | ​ | ​ | 12,566
Total accrued expenses | ​ | $ | 67,620 | ​ | $ | 49,867

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