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Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator
Net income	$ 1,824	$ 5,528
Determination of shares
Weighted-average common shares outstanding	5,045	5,046
Dilutive effect - share-based awards	9	18
Diluted weighted-average common shares outstanding	5,054	5,064
Earnings per common share
Basic	$ 0.36	$ 1.10
Diluted	$ 0.36	$ 1.09

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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