Net Loss Per Common Share - Calculation of Basic and Diluted Loss Per Common Share and Common Share Equivalents (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic net loss per common share
Net loss	$ (376)	$ (2,268)	$ (1,817)	$ (3,911)
Less: Preferred stock dividends	(7)	(7)	(14)	(14)
Net income (loss) applicable to common stock	$ 76	$ (2,275)	$ (1,372)	$ (3,925)
Basic weighted average number of common shares outstanding	10,803	10,789	10,803	10,789
Basic net income (loss) per common share	$ 0.01	$ (0.21)	$ (0.13)	$ (0.36)
Diluted loss per common share
Net loss applicable to common stock	$ 76	$ (2,275)	$ (1,372)	$ (3,925)
Add: Preferred stock dividends	(7)
Net loss applicable to dilutive common stock	$ (376)	$ (2,275)	$ (1,372)	$ (3,925)
Basic weighted average number of common shares outstanding	10,803	10,789	10,803	10,789
Effect of dilutive securities
Dilutive stock awards	40
Dilutive preferred share conversions	111
Weighted average number of diluted shares outstanding adjustment	151
Diluted weighted average number of common shares outstanding	10,954	10,789	10,803	10,789
Diluted net loss per common share	$ (0.03)	$ (0.21)	$ (0.13)	$ (0.36)
Series C Preferred Stock [Member]
Basic net loss per common share
Excess of carrying value of Series C Preferred Stock over redemption value	$ 459		$ 459
Diluted loss per common share
Excess of carrying value of Series C Preferred Stock over redemption value	$ 459		$ 459