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SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION (Tables) | 3 Months Ended
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Apr. 30, 2023
SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION |
Schedule of other current assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | April 30, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Income tax refunds receivable and prepaid income taxes | ​ | $ | 16,233 | ​ | $ | 15,327
Raw materials inventory | ​ | ​ | 12,172 | ​ | ​ | 11,903
Prepaid expenses | ​ |  | 7,862 | ​ |  | 4,541
Other | ​ | ​ | 6,109 | ​ | ​ | 6,563
Total other current assets | ​ | $ | 42,376 | ​ | $ | 38,334
Schedule of accrued expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | April 30, | ​ | January 31,
​ | ​ | 2023 |  | 2023
Accrued compensation | ​ | $ | 11,382 | ​ | $ | 18,286
Project costs | ​ | ​ | 21,764 | ​ | ​ | 17,448
Lease liabilities | ​ | ​ | 1,491 | ​ | ​ | 1,567
Other | ​ | ​ | 10,118 | ​ | ​ | 12,566
Total accrued expenses | ​ | $ | 44,755 | ​ | $ | 49,867

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