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Note 3 - Inventories (Details Textual) |  | 12 Months Ended
--- | --- | ---
Oct. 27, 2021 USD ($) lb | Jul. 31, 2021 USD ($) lb | Jul. 31, 2020 USD ($)
Increase (Decrease) in Inventories, Total | $ |  | $ 28,960,818 |
Uranium Inventory [Member] |  |  |
Increase in Purchase Obligations, Mass (Pound) |  | 3,700,000 |
Inventory, Increase from Purchases, Mass (Pound) |  | 1,000,000 |
Uranium Inventory [Member] | Subsequent Event [Member] |  |  |
Increase in Purchase Obligations, Mass (Pound) | 400,000 |  |
Inventory, Increase from Purchases, Mass (Pound) | 200,000 |  |
Increase (Decrease) in Inventories, Purchase Obligation | $ | $ 14,500,000 |  |
Increase (Decrease) in Inventories, Total | $ | $ 6,980,000 |  |

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- Definition The increase (decrease) during the reporting period in the aggregate value of all purchase obligations of inventory. + References No definition available. + Details
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- Definition The amount of mass of increase in purchase obligations during the period. + References No definition available. + Details
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- Definition The amount of mass of increase in inventory from purchases during the period. + References No definition available. + Details
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- Definition The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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