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Calculations of Basic and Diluted Income per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share Disclosure [Line Items]      
Net (loss) income – Basic and Diluted $ (1,720) $ 2,154 $ 15,720
Weighted-average shares outstanding - Basic 19,452 14,505 14,174
Effect of dilutive securities: Stock options and other stock awards 450 375
Weighted-average shares outstanding – Diluted 19,452 14,955 14,549
Basic (loss) income per common share $ (0.09) $ 0.15 $ 1.11
Diluted (loss) income per common share $ (0.09) $ 0.14 $ 1.08