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Note 4 - Land Purchases and Sales (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Land Property Purchase [Table Text Block] |
|  | +/- |  | Louisiana |  |  |  |  |  |  |  |  |  | Mineral |
Quarter |  | Acres |  | Parish |  | Ownership |  |  | Land |  |  | Rights % |
2nd |  |  | 1.81 |  | Jefferson Davis |  |  | 16.67 | % |  | $ | 564 |  |  |  | 0 | %
Schedule of Land Property Sales [Table Text Block] |
|  | +/- |  | Louisiana |  |  |  |  |  |  |  |  |  | Mineral |
Quarter |  | Acres |  | Parish |  | Ownership |  |  | Land |  |  | Rights % |
1st |  |  | 80.00 |  | Jefferson Davis |  |  | 16.67 | % |  | $ | 149,992 |  |  |  | 0 | %
|  | +/- |  | Louisiana |  |  |  |  |  |  |  |  |  | Mineral |
Quarter |  | Acres |  | Parish |  | Ownership |  |  | Land |  |  | Rights % |
3rd |  |  | 6.67 |  | Calcasieu |  |  | 16.67 | % |  | $ | 5,667 |  |  |  | 0 | %
4th |  |  | 6.67 |  | Allen |  |  | 16.67 | % |  | $ | 13,305 |  |  |  | 0 | %

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- Definition Tabular disclosure of land property purchase. + References No definition available. + Details
Name: | ckx_ScheduleOfLandPropertyPurchaseTableTextBlock
Namespace Prefix: | ckx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure for property sales. + References No definition available. + Details
Name: | ckx_ScheduleOfLandPropertySalesTableTextBlock
Namespace Prefix: | ckx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration