Note 3 - Accounts Receivable	9 Months Ended
Oct. 31, 2023
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Note 3 - Accounts receivable The majority of the Company's accounts receivable consist of geographically dispersed contractors and manufacturing companies. Credit is extended based on an evaluation of a customer's financial condition. In the United States, collateral is not generally required. In the United Arab Emirates ("U.A.E."), Saudi Arabia, Egypt and India, letters of credit are obtained for substantially all orders. Accounts receivable are due within various time periods specified in the terms applicable to the specific contract and are stated at amounts due from customers net of any allowance for claims and credit losses. The allowance for credit losses is based on specifically identified amounts in customers' accounts, where future collectability is deemed uncertain. Management exercises its judgment in adjusting the provision as a consequence of known items, such as current economic factors and credit trends. Past due trade accounts receivable balances are written off when an amount is deemed uncollectible and all attempts to collect have been exhausted. The write-off is recorded against the allowance for credit losses. 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 $39.5 million as of October 31, 2023, with a remaining balance due in the amount of $2.4 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 amount, $1.6 million is classified in other long-term assets on the Company's consolidated balance sheets. Regardless of the contractual due date for payment, the Company has been actively engaged in ongoing efforts to collect this outstanding balance. The Company continues to engage with the customer to ensure full payment of the open balances. In September 2023 and June 2022, a partial payment was received to settle $0.4 million and $0.9 million of the customer's outstanding balances, respectively. Further, the Company has been engaged by the customer to perform additional work in 2022 and 2023 under customary trade terms that supports the continued cooperation between the Company and the customer. As a result, the Company did not reserve any allowance against the remaining outstanding balances as of October 31, 2023. However, if the Company’s efforts to collect on this account are not successful, the Company may recognize an allowance for all, or substantially all, of any such uncollected amounts. For the three months ended October 31, 2023, one customer accounted for 14% of the Company's consolidated net sales, and during the same period in 2022, no individual customer accounted for greater than 10% of the Company’s consolidated net sales. For the nine months ended October 31, 2023 and 2022, no individual customer accounted for greater than 10% of the Company's consolidated net sales. As of October 31, 2023 and January 31, 2023, two customers accounted for 24% of the Company's accounts receivable, and one customer accounted for 12% of the Company's accounts receivable, respectively.

Note 3 - Accounts Receivable

9 Months Ended

Oct. 31, 2023

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

Note 3 - Accounts receivable

The majority of the Company's accounts receivable consist of geographically dispersed contractors and manufacturing companies. Credit is extended based on an evaluation of a customer's financial condition. In the United States, collateral is not generally required. In the United Arab Emirates ("U.A.E."), Saudi Arabia, Egypt and India, letters of credit are obtained for substantially all orders. Accounts receivable are due within various time periods specified in the terms applicable to the specific contract and are stated at amounts due from customers net of any allowance for claims and credit losses. The allowance for credit losses is based on specifically identified amounts in customers' accounts, where future collectability is deemed uncertain. Management exercises its judgment in adjusting the provision as a consequence of known items, such as current economic factors and credit trends. Past due trade accounts receivable balances are written off when an amount is deemed uncollectible and all attempts to collect have been exhausted. The write-off is recorded against the allowance for credit losses.

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 $39.5 million as of October 31, 2023, with a remaining balance due in the amount of $2.4 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 amount, $1.6 million is classified in other long-term assets on the Company's consolidated balance sheets.

Regardless of the contractual due date for payment, the Company has been actively engaged in ongoing efforts to collect this outstanding balance. The Company continues to engage with the customer to ensure full payment of the open balances. In September 2023 and June 2022, a partial payment was received to settle $0.4 million and $0.9 million of the customer's outstanding balances, respectively. Further, the Company has been engaged by the customer to perform additional work in 2022 and 2023 under customary trade terms that supports the continued cooperation between the Company and the customer. As a result, the Company did not reserve any allowance against the remaining outstanding balances as of October 31, 2023. However, if the Company’s efforts to collect on this account are not successful, the Company may recognize an allowance for all, or substantially all, of any such uncollected amounts.

For the three months ended October 31, 2023, one customer accounted for 14% of the Company's consolidated net sales, and during the same period in 2022, no individual customer accounted for greater than 10% of the Company’s consolidated net sales. For the nine months ended October 31, 2023 and 2022, no individual customer accounted for greater than 10% of the Company's consolidated net sales.

As of October 31, 2023 and January 31, 2023, two customers accounted for 24% of the Company's accounts receivable, and one customer accounted for 12% of the Company's accounts receivable, respectively.