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v3.23.1

Note 3 - Accounts Receivable (Details Textual) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2022 USD ($) | Apr. 30, 2023 USD ($) | Apr. 30, 2022 USD ($) | Jan. 31, 2023 | Jan. 31, 2022 | Dec. 31, 2015 USD ($)
Increase (Decrease) in Accounts Receivable |  | $ (1,862) | $ (3,493) |  |  |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |
Number of Major Customers |  | 1 | 0 |  |  |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member] |  |  |  |  |  |
Concentration Risk, Percentage |  | 18.80% |  |  |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |
Number of Major Customers |  | 1 |  |  | 1 |
Accounts Receivable [Member] | Customer Concentration Risk [Member] | One Customer [Member] |  |  |  |  |  |
Concentration Risk, Percentage |  | 16.30% |  | 11.90% |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss |  | $ 2,700 |  |  |  | $ 41,900
Increase (Decrease) in Accounts Receivable | $ (900) | (39,100) |  |  |  |
Accounts Receivable, Allowance for Credit Loss |  | 0 |  |  |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Noncurrent Assets [Member] |  |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Noncurrent |  | $ 1,600 |  |  |  |

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