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Note 6 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2023 | Jul. 31, 2022
Sale of marine technology products | $ 8,750 | [1] | $ 8,713 | $ 21,336 | [1] | $ 17,800
Transferred at Point in Time [Member] |  |  |  |  |  |
Sale of marine technology products | 8,283 |  | 7,976 | 20,160 |  | 16,977
Transferred over Time [Member] |  |  |  |  |  |
Sale of marine technology products | 467 |  | 737 | 1,176 |  | 823
Seamap [Member] | Transferred at Point in Time [Member] |  |  |  |  |  |
Sale of marine technology products | 7,103 |  | 4,288 | 17,508 |  | 12,281
Seamap [Member] | Transferred over Time [Member] |  |  |  |  |  |
Sale of marine technology products | 458 |  | 737 | 650 |  | 823
Klein [Member] | Transferred at Point in Time [Member] |  |  |  |  |  |
Sale of marine technology products | 1,180 |  | 3,688 | 2,652 |  | 4,696
Klein [Member] | Transferred over Time [Member] |  |  |  |  |  |
Sale of marine technology products | 9 |  | 0 | 526 |  | 0
UNITED STATES |  |  |  |  |  |
Sale of marine technology products | 378 |  | 2,333 | 1,720 |  | 4,586
Europe, Russia and CIS [Member] |  |  |  |  |  |
Sale of marine technology products | 2,965 |  | 4,082 | 10,000 |  | 8,694
Middle East and Africa [Member] |  |  |  |  |  |
Sale of marine technology products | 4,700 |  | 2,042 | 8,653 |  | 4,226
Asia Pacific [Member] |  |  |  |  |  |
Sale of marine technology products | $ 707 |  | $ 256 | $ 963 |  | $ 294
[1] | Reflects the condensed consolidated balance sheet as of July 31, 2023 and condensed consolidated statement of operations for the three and six months ended July 31, 2023 and 2023 in the Form 10-Q.

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-4 + Details
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