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Earnings (Loss) Per Common Share - Computation of Basic and Diluted Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net loss attributable to common stockholders	[1]	$ (2,584)	$ (7,413)
Weighted average basic shares		8,525,645	8,305,764
Total weighted average diluted shares with assumed conversions		8,525,645	8,305,764
Loss from operations per common share:
Basic		$ (0.30)	$ (0.89)
Dilutive		$ (0.30)	$ (0.89)
[1] Net of preferred dividends of $356 and $353 in 2017 and 2016, respectively.

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