Note 3 - Retention	12 Months Ended
Jan. 31, 2025
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables, Excluding Allowance for Credit Losses [Text Block]	Note 3 - Retention A retention receivable is a portion of an outstanding receivable balance amount withheld by a customer until a contract is fully completed as specified in the contract. As of January 31, 2025 and 2024, the Company had short-term retention receivables of $3.3 million and $2.4 million, respectively, which were included as a component of trade accounts receivable. Additionally, the Company had long-term retention receivables of $2.6 million and $1.7 million as of January 31, 2025 and 2024, respectively. The long-term retention receivable balances were included as a component of other long-term assets in the Company's consolidated balance sheets. See Note 2 - Accounts receivable for further information regarding the future realization of these long-term balances. In 2015, the Company completed a project in the Middle East with billings in the aggregate amount of approximately $41.9 million. The system has not yet been commissioned by the customer. Nevertheless, the Company has settled approximately $ 40.1 million as of January 31, 2025, with a remaining balance due in the amount of $ 1.8 million, all of which pertains to retention clauses within the agreements with the Company's customer, and which become payable by the customer when this project is fully tested and commissioned. Of this retention amount, $ 1.2 million is classified as a long-term asset. The Company has been actively engaged in ongoing collection efforts with the customer to ensure full payment of open balances, and at various times throughout 2025 and 2024, the Company received a partial payment to settle $0.4 million and $0.6 million of the customer's outstanding balances, respectively, including an additional $0.6 million that was received subsequent to the end of the year. Additionally, the Company has been engaged by the customer to perform additional work in 2025 under customary trade credit terms that support the continued cooperation between the Company and the customer. As a result, the Company did not reserve any allowance against this outstanding receivable as of January 31, 2025. However, if the Company's efforts to collect on this account are not successful, the Company may recognize an allowance for all, or substantial all, of any such uncollected amounts. For further information regarding accounts receivable, see Note 2 - Significant accounting policies, in the Notes to Consolidated Financial Statements.

Note 3 - Retention

12 Months Ended

Jan. 31, 2025

Loans, Notes, Trade and Other Receivables, Excluding Allowance for Credit Losses [Text Block]

Note 3 - Retention

A retention receivable is a portion of an outstanding receivable balance amount withheld by a customer until a contract is fully completed as specified in the contract. As of January 31, 2025 and 2024, the Company had short-term retention receivables of $3.3 million and $2.4 million, respectively, which were included as a component of trade accounts receivable. Additionally, the Company had long-term retention receivables of $2.6 million and $1.7 million as of January 31, 2025 and 2024, respectively. The long-term retention receivable balances were included as a component of other long-term assets in the Company's consolidated balance sheets. See Note 2 - Accounts receivable for further information regarding the future realization of these long-term balances.

In 2015, the Company completed a project in the Middle East with billings in the aggregate amount of approximately $41.9 million. The system has not yet been commissioned by the customer. Nevertheless, the Company has settled approximately $ 40.1 million as of January 31, 2025, with a remaining balance due in the amount of $ 1.8 million, all of which pertains to retention clauses within the agreements with the Company's customer, and which become payable by the customer when this project is fully tested and commissioned. Of this retention amount, $ 1.2 million is classified as a long-term asset.

The Company has been actively engaged in ongoing collection efforts with the customer to ensure full payment of open balances, and at various times throughout 2025 and 2024, the Company received a partial payment to settle $0.4 million and $0.6 million of the customer's outstanding balances, respectively, including an additional $0.6 million that was received subsequent to the end of the year. Additionally, the Company has been engaged by the customer to perform additional work in 2025 under customary trade credit terms that support the continued cooperation between the Company and the customer. As a result, the Company did not reserve any allowance against this outstanding receivable as of January 31, 2025. However, if the Company's efforts to collect on this account are not successful, the Company may recognize an allowance for all, or substantial all, of any such uncollected amounts.

For further information regarding accounts receivable, see Note 2 - Significant accounting policies, in the Notes to Consolidated Financial Statements.