Common Stock and Units - Additional Information (Detail)						2 Months Ended	3 Months Ended		4 Months Ended	7 Months Ended	12 Months Ended		27 Months Ended
	Feb. 22, 2019 shares	Feb. 11, 2019 shares	Feb. 05, 2018 shares	Jan. 01, 2018 shares	Dec. 02, 2016 USD ($) $ / shares	Feb. 28, 2017 USD ($) shares	Mar. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2018 shares	Dec. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) shares	Mar. 31, 2019 USD ($) $ / shares shares	Aug. 31, 2018 USD ($) $ / shares
Class of Stock [Line Items]
Common stock, shares authorized							49,000,000		49,000,000	49,000,000	49,000,000		49,000,000
Common stock, par value | $ / shares					$ 0.01		$ 0.01		$ 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	0				0	682,500
Purchased common stock, value | $						$ 4,900,000						$ 4,900,000
Common stock, shares outstanding							14,222,378		14,209,378	14,222,378	14,209,378		14,222,378
Common stock exchange ratio							1			1			1
Redemption of units in operating partnership													0
Operating Partnership common units not owned							1,778,140		1,778,140	1,778,140	1,778,140		1,778,140
Sotherly Hotels LP [Member]
Class of Stock [Line Items]
Operating Partnership common units outstanding							16,000,518		15,987,518	16,000,518	15,987,518		16,000,518
Fair market value | $							$ 12,100,000		$ 10,000,000	$ 12,100,000	$ 10,000,000		$ 12,100,000
Common Stock [Member]
Class of Stock [Line Items]
Restricted shares issued							13,000	40,000
Common Stock [Member] | Sotherly Hotels LP [Member]
Class of Stock [Line Items]
Number of issued unit in Operating Partnership	250	12,750	17,250	25,000
Restricted shares issued			15,000	25,000
Non-restricted shares issued			2,250
Sales Agency Agreement [Member] | Sandler O’Neill [Member]
Class of Stock [Line Items]
Common stock, par value | $ / shares														$ 0.01
Aggregate gross sale price of common stock | $														$ 5,000,000
Proceeds from sale of common stock, net | $									$ 600,000
Sales Agency Agreement [Member] | Sandler O’Neill [Member] | Common Stock [Member]
Class of Stock [Line Items]
Common stock, par value | $ / shares														$ 0.01
Aggregate gross sale price of common stock | $														$ 5,000,000
Stock issued during period							0		88,297	88,297
Maximum [Member]
Class of Stock [Line Items]
Repurchased common stock, value | $					$ 10,000,000