Net (Loss) Income Per Common Share - Calculation of Basic and Diluted Income (Loss) Per Common Share and Common Share Equivalents (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Basic net (loss) income per common share
Net loss	$ (1,514)	$ (376)	$ (742)	$ (1,817)
Less: Preferred stock dividends		(7)		(14)
Net (loss) income available to common stockholders	$ (1,514)	$ 76	$ (742)	$ (1,372)
Basic weighted average number of common shares outstanding	11,103	10,803	11,023	10,803
Basic net (loss) income per common share	$ (0.14)	$ 0.01	$ (0.07)	$ (0.13)
Diluted income (loss) per common share
Net (loss) income applicable to common stock	$ (1,514)	$ 76	$ (742)	$ (1,372)
Add: Preferred stock dividends		7		14
Net loss applicable to dilutive common stock	$ (1,514)	$ (376)	$ (742)	$ (1,372)
Basic weighted average number of common shares outstanding	11,103	10,803	11,023	10,803
Effect of dilutive securities
Dilutive stock awards		40
Dilutive preferred share conversion		111
Weighted Average Number Diluted Shares Outstanding Adjustment		151
Diluted weighted average number of common shares outstanding	11,103	10,954	11,023	10,803
Diluted net (loss) income per common share	$ (0.14)	$ (0.03)	$ (0.07)	$ (0.13)
Series C Preferred Stock [Member]
Basic net (loss) income per common share
Excess of carrying value of Series C Preferred Stock over redemption value		$ 459		$ 459	$ 500
Diluted income (loss) per common share
Excess of carrying value of Series C Preferred Stock over redemption value		$ 459		$ 459	$ 500