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Common Stock and Units - Additional Information (Detail)
 2 Months Ended 3 Months Ended 12 Months Ended 15 Months Ended
Feb. 05, 2018
shares
Jan. 01, 2018
shares
Feb. 15, 2017
shares
Dec. 02, 2016
USD ($)
$ / shares
Feb. 28, 2017
USD ($)
shares
Mar. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
$ / shares
shares
Class of Stock [Line Items]                
Common stock, shares authorized           49,000,000 49,000,000 49,000,000
Common stock, par value | $ / shares       $ 0.01   $ 0.01 $ 0.01 $ 0.01
Voting right           Each outstanding share of common stock entitles the holder to one vote on all matters submitted to a vote of stockholders.    
Repurchased common stock, value | $             $ 5,900,000  
Number of common stock shares repurchased           0 882,820  
Number of common stock, shares purchased         682,500      
Purchased common stock, value | $         $ 4,900,000      
Common stock, shares outstanding           14,121,081 14,078,831 14,121,081
Common stock exchange ratio           1   1
Redemption of units in operating partnership               0
Operating Partnership common units not owned           1,778,140 1,778,140 1,778,140
Common Stock [Member]                
Class of Stock [Line Items]                
Restricted shares issued           40,000    
Sotherly Hotels LP [Member]                
Class of Stock [Line Items]                
Operating Partnership common units outstanding           15,899,221 15,856,971 15,899,221
Fair market value | $           $ 11,200,000 $ 11,500,000 $ 11,200,000
Sotherly Hotels LP [Member] | Common Stock [Member]                
Class of Stock [Line Items]                
Number of issued unit in Operating Partnership 17,250 25,000 12,000          
Restricted shares issued 15,000 25,000 12,000          
Non-restricted shares issued 2,250              
Maximum [Member]                
Class of Stock [Line Items]                
Repurchased common stock, value | $       $ 10,000,000