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Balance Sheets (Unaudited) (Parentheticals) (USD $)
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Jun. 30, 2013
acre
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Dec. 31, 2012
acre
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|---|---|---|
| Acres | 10,125 | 10,125 |
| Number of lots | 318 | 318 |
| Sub-share Certificates in Certificates of Proprietary Interest, par value (in Dollars per share) | $ 0.03 | $ 0.03 |
| Sub-share Certificates in Certificates of Proprietary Interest, outstanding (in Shares) | 8,646,235 | 8,795,258 |
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Land Surface Rights [Member]
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| Land (surface rights) | 911,391 | 911,491 |
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Royalty Interests In Acres 1_16 [Member]
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| Nonparticipaing perpetual royalty interest in acres | 373,777 | 373,777 |
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Royalty Interests In Acres 1_128 [Member]
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| Nonparticipaing perpetual royalty interest in acres | 85,414 | 85,414 |
| X | ||||||||||
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- Definition
Number of acres. No definition available.
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| X | ||||||||||
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- Definition
Represents the number of acres related to non-participating perpetual royalty interests. No definition available.
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| X | ||||||||||
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- Definition
Number of lots. No definition available.
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| X | ||||||||||
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- Definition
Surface rights in acre as part of land owned. No definition available.
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| X | ||||||||||
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- Definition
Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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