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Stockholders' Equity (Narrative) (Details)
1 Months Ended 2 Months Ended 12 Months Ended
Jun. 28, 2016
USD ($)
Feb. 29, 2016
shares
Apr. 30, 2016
USD ($)
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
a
shares
Dec. 31, 2014
USD ($)
shares
Mar. 31, 2016
$ / shares
Class of Stock [Line Items]              
Proceeds from the issuance of common stock | $     $ 4,000,000 $ 4,547,889 $ 6,000,000 $ 10,993,282  
Proceeds from the issuance of common stock, net of issuance costs | $     $ 3,500,000        
Shares issued     11,500,000        
Average price per share (in dollars per share) | $ / shares             $ 0.35
Common Stock              
Class of Stock [Line Items]              
Payment of dividends, shares       0 5,670,065 2,254,599  
Payment of dividend | $         $ 3,900,000 $ 3,900,000  
2011 Equity Incentive Plan              
Class of Stock [Line Items]              
Vested restricted stock, (in shares)       0 60,000    
Land              
Class of Stock [Line Items]              
Area of land purchased (in acres) | a         212    
Payments to acquire land | $         $ 1,500,000    
Commercial Residential Building and Lot              
Class of Stock [Line Items]              
Stock issued during period for purchase of assets (in shares)       223,645      
Fair value of common stock issued for purchase of land | $       $ 59,390      
Restricted stock | Land | Common Stock              
Class of Stock [Line Items]              
Stock issued during period for purchase of assets (in shares)         650,000    
Restricted shares of common stock canceled (in shares)         650,000    
Note Payable (Daney Ranch Property) | Common Stock              
Class of Stock [Line Items]              
Stock issued for satisfaction of debt (in shares)   3,000,000   3,000,000      
Stock issued for satisfaction of debt, fair value | $       $ 1,290,000      
Note Payable - Dayton Property (Golden Goose) | Common Stock              
Class of Stock [Line Items]              
Stock issued during period for purchase of assets (in shares)       1,000,000      
Stock issued for satisfaction of debt (in shares)       1,000,000      
Stock issued for satisfaction of debt, fair value | $       $ 360,000      
Capital Lease Obligations | Varilease Capital Lease Obligations              
Class of Stock [Line Items]              
Stock issued for satisfaction of debt (in shares)       6,617,896      
Capital Lease Obligations | Varilease Capital Lease Obligations | Common Stock              
Class of Stock [Line Items]              
Stock issued for satisfaction of debt (in shares)       6,617,896      
Stock issued for satisfaction of debt, fair value | $       $ 2,473,764      
Northern Comstock LLC | Common Stock              
Class of Stock [Line Items]              
Stock issued as capital contribution to related party (in shares)       1,215,124      
Stock issued as capital contribution to related party | $       $ 482,526      
ATM Agreement              
Class of Stock [Line Items]              
Proceeds from the issuance of common stock | $       $ 508,799      
Shares issued       1,835,300      
Average price per share (in dollars per share) | $ / shares       $ 0.28      
ATM Agreement | International Assets Advisory LLC              
Class of Stock [Line Items]              
Aggregate offering price | $ $ 5,000,000.0     $ 5,000,000.0      
Commission paid (as a percent) 2.50%