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STOCKHOLDERS' EQUITY (Details)
 3 Months Ended 12 Months Ended
Nov. 30, 2015
USD ($)
Oct. 22, 2015
USD ($)
Jul. 20, 2015
USD ($)
Apr. 30, 2015
USD ($)
Jul. 22, 2013
USD ($)
Apr. 22, 2013
USD ($)
Jan. 21, 2013
USD ($)
Dec. 31, 2013
USD ($)
Sep. 30, 2013
USD ($)
Jun. 30, 2013
USD ($)
Mar. 31, 2013
USD ($)
Dec. 31, 2015
USD ($)
item
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2013
USD ($)
Stock repurchase program                            
Number of classes of preferred stock outstanding | item                       1    
Dividend paid | $                       $ 283,543 $ 172,838 $ 230,449
Common stock authorized (in shares) | shares                       100,000,000 100,000,000  
Common stock outstanding (in shares) | shares                       28,619,874 27,613,397  
Preferred Class A                            
Stock repurchase program                            
Preferred stock authorized (in shares) | shares                       5,000,000    
Preferred stock par value (in dollars per share)                       $ 1    
Class B                            
Stock repurchase program                            
Preferred stock authorized (in shares) | shares                       5,000,000 5,000,000  
Preferred stock par value (in dollars per share)                       $ 1 $ 1  
Number of series of preferred stock class B | item                       5    
Preferred stock, remaining authorized shares to which series have Not been assigned | shares                       4,218,555    
Series I, Class B                            
Stock repurchase program                            
Preferred stock par value (in dollars per share)                       $ 1 $ 1  
Preferred stock outstanding (in shares) | shares                       98,500 98,500  
Cumulative annual dividend payable quarterly (in dollars per share)                       $ 0.50    
Dividend paid | $   $ 12,313 $ 12,313 $ 37,891 $ 12,938 $ 12,938 $ 12,938 $ 12,938 $ 12,938 $ 12,938 $ 12,938 $ 62,516 $ 38,814 38,814
Preferred stock dividend in arrears | $                       $ 0    
Period after which stock is redeemable at the option of the entity                       3 years    
Preferred stock redemption price (in dollars per share)                       $ 7.50    
Preferred stock conversion ratio                       1    
Period after which stock can be converted at the option of the stockholders                       3 years    
Number of shares of preferred stock converted into common stock | shares                       0 5,000  
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share)                       $ 6.25    
Series II, Class B                            
Stock repurchase program                            
Preferred stock par value (in dollars per share)                       $ 1 $ 1  
Preferred stock outstanding (in shares) | shares                       171,200 176,200  
Cumulative annual dividend payable quarterly (in dollars per share)                       $ 1.00    
Dividend paid | $   $ 44,050 $ 44,050 $ 132,926 $ 44,675 $ 44,675 $ 44,675 $ 44,675 $ 44,675 $ 44,675 $ 44,675 $ 221,026 $ 134,025 $ 134,025
Preferred stock dividend in arrears | $                       $ 0    
Period after which stock is redeemable at the option of the entity                       3 years    
Preferred stock redemption price (in dollars per share)                       $ 15.00    
Preferred stock conversion ratio                       1    
Period after which stock can be converted at the option of the stockholders                       3 years    
Number of shares of preferred stock converted into common stock | shares                       5,000 2,500  
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share)                       $ 12.50    
Number of consecutive quarters in which preferred stockholders have no voting right until dividends are in arrears | item                       12    
Right of preferred stock holders to elect a specified proportion of board of directors                       0.33    
Series III, Class B                            
Stock repurchase program                            
Preferred stock par value (in dollars per share)                       $ 1 $ 1  
Preferred stock outstanding (in shares) | shares                       129,245 130,245  
Cumulative annual dividend payable quarterly (in dollars per share)                       $ 1.00    
Preferred stock dividend in arrears | $                       $ 3,887,000    
Period after which stock is redeemable at the option of the entity                       3 years    
Preferred stock redemption price (in dollars per share)                       $ 15.00    
Preferred stock conversion ratio                       1    
Period after which stock can be converted at the option of the stockholders                       3 years    
Number of shares of preferred stock converted into common stock | shares                       1,000 0  
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share)                       $ 12.50    
Series IV, Class B                            
Stock repurchase program                            
Preferred stock par value (in dollars per share)                       $ 1 $ 1  
Preferred stock outstanding (in shares) | shares                       342,500 542,500  
Cumulative annual dividend payable quarterly (in dollars per share)                       $ 1.00    
Preferred stock dividend in arrears | $ $ 3,094,795                     $ 5,456,000    
Period after which stock is redeemable at the option of the entity                       3 years    
Preferred stock redemption price (in dollars per share)                       $ 11.00    
Preferred stock conversion ratio                       1    
Period after which stock can be converted at the option of the stockholders                       3 years    
Number of shares of preferred stock converted into common stock | shares                       0 0  
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share)                       $ 11.00    
Number of shares cancelled as a result of the agreement entered in to by the company | shares                       200,000    
Series V, Class B                            
Stock repurchase program                            
Preferred stock par value (in dollars per share)                       $ 1 $ 1  
Preferred stock outstanding (in shares) | shares                       40,000 40,000  
Cumulative annual dividend payable quarterly (in dollars per share)                       $ 0.32    
Preferred stock dividend in arrears | $                       $ 970,000    
Period after which stock is redeemable at the option of the entity                       2 years    
Preferred stock redemption price (in dollars per share)                       $ 4.40    
Number of shares of preferred stock converted into common stock | shares                       0 0  
Amount per share the holders of the preferred stock entitled to in voluntary or involuntary dissolution, liquidation or winding up of the Company (in dollars per share)                       $ 4.40    
Preferred Class C                            
Stock repurchase program                            
Preferred stock authorized (in shares) | shares                       5,000,000    
Preferred stock par value (in dollars per share)                       $ 1    
Common Stock                            
Stock repurchase program                            
Common stock authorized (in shares) | shares                       100,000,000 100,000,000  
Common stock no par value (in dollars per share)                       $ 0 $ 0  
Common stock outstanding (in shares) | shares                       28,619,874 27,613,397