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Note 4 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2021 | Jan. 31, 2021
Costs Incurred for Uncompleted Contracts, Anticipated Collection Period (Year) | 1 year |
Contract with Customer, Liability, Revenue Recognized |  | $ 1,200
Contract with Customer, Liability, Current | $ 871 | 762
Unbilled Receivables, Current | 3,415 | 247
Middle East [Member] |  |
Unbilled Receivables, Current | $ 3,400 | 200
Other Nonoperating Income (Expense) [Member] |  |
Expense Related to Encashment |  | $ 600

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 + Details
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