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Condensed Consolidated Statement of Changes in Equity - USD ($)
Total
Common Stock [Member]
Additional Paid In Capital [Member]
Dividends In Excess of Accumulated Losses [Member]
Parent [Member]
Noncontrolling Interests [Member]
Beginning balance (in shares) at Dec. 31, 2014   16,887,377        
Beginning balance at Dec. 31, 2014 $ 71,536,333 $ 168,874 $ 143,715,876 $ (83,150,866) $ 60,733,884 $ 10,802,449
Net (loss) income (2,027,498)     (3,818,692) (3,818,692) 1,791,194
Dividends declared, paid and reinvested (in shares)   280,120        
Dividends declared, paid and reinvested, value (4,190,009) $ 2,801 2,658,960 (6,851,770) (4,190,009)  
Common stock repurchased (in shares)   (5,513)        
Common stock repurchased, value (28,709) $ (55) (28,654)   (28,709)  
Common stock repurchased from related party (in shares)   (18,806)        
Common stock repurchased from related party, value (147,752) $ (188) (147,564)   (147,752)  
Common stock issued (in shares)   5,000        
Common stock issued, value 49,999 $ 50 49,949   49,999  
Contributions from noncontrolling interests, net of distributions paid (493,534)         (493,534)
Vesting of restricted stock (in shares)   54,050        
Vesting of restricted stock, value 464,827 $ 541 464,286   464,827  
Ending balance (in shares) at Dec. 31, 2015   17,202,228        
Ending balance at Dec. 31, 2015 65,163,657 $ 172,023 146,712,853 (93,821,328) 53,063,548 12,100,109
Net (loss) income (5,571,083)     (5,812,485) (5,812,485) 241,402
Dividends declared, paid and reinvested (in shares)   250,608        
Dividends declared, paid and reinvested, value (4,625,757) $ 2,506 2,361,881 (6,990,144) (4,625,757)  
Common stock repurchased (in shares)   (10,625)        
Common stock repurchased, value (55,031) $ (106) (54,925)   (55,031)  
Contributions from noncontrolling interests, net of distributions paid 317,266         317,266
Vesting of restricted stock (in shares)   60,462        
Vesting of restricted stock, value 520,578 $ 605 519,973   520,578  
Ending balance (in shares) at Dec. 31, 2016   17,502,673        
Ending balance at Dec. 31, 2016 55,749,630 $ 175,028 149,539,782 (106,623,957) 43,090,853 12,658,777
Net (loss) income (779,559)     (994,387) (994,387) 214,828
Dividends declared/reinvested, value (2,436,596) $ 1,194 1,106,676 (3,544,466) (2,436,596)  
Dividends declared/reinvested (in shares)   119,407        
Common stock repurchased (in shares)   (2,962)        
Common stock repurchased, value (17,394) $ (29) (17,365)   (17,394)  
Contributions from noncontrolling interests, net of distributions paid 1,004,164         1,004,164
Ending balance (in shares) at Jun. 30, 2017   17,619,118        
Ending balance at Jun. 30, 2017 $ 53,520,245 $ 176,193 $ 150,629,093 $ (111,162,810) $ 39,642,476 $ 13,877,769