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Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Jul. 30, 2015
Jun. 14, 2012
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock based compensation expense     $ 64,000 $ 62,000      
Stock-based compensation expense         $ 224,921 $ 189,602  
Proceeds from sale of RV Park         99,441    
Gain on disposal of assets     $ 347,348   $ 347,348    
Stock Options [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation, vesting period         42 months    
Share-based compensation, expiration period         10 years    
Period options become exercisable         4 years    
Employee Deferred Stock Award [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation, other than options granted         1,000    
Share-based compensation, vesting period         4 years    
Share-based compensation, nonvested number of shares     35,500   35,500   34,750
Share-based Compensation, nonvested, weighted average grant date fair value     $ 10.26   $ 10.26   $ 10.27
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock, percentage that will vest         100.00%    
Share-based compensation, vesting period         1 year    
Share-based compensation, nonvested number of shares     13,940   13,940    
Share-based Compensation, nonvested, weighted average grant date fair value     $ 10.76   $ 10.76    
Stock Appreciation Rights (SARs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock based compensation expense         $ 142,000 $ 80,000  
Share-based compensation, other than options granted   165,000        
Share-based compensation, nonvested number of shares             115,500
Share-based Compensation, nonvested, weighted average grant date fair value             $ 4.50
Benefit from appreciation in the value of common stock, per share   $ 14.30          
Number of shares of stock each right represents   1          
Percentage of the Rights vested   10.00%          
Number of the Rights vested   16,500          
Number of remaining Rights vest per year   16,500          
Shakopee Valley RV Park [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Proceeds from sale of RV Park $ 100,000            
Gain on disposal of assets $ 347,000