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Computation of Earnings (Loss) Per Share - Calculation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator
Net income (loss)	$ 2,658	$ (256)
Determination of shares
Weighted-average common shares outstanding	5,211	5,396
Dilutive effect - share-based awards	18	0
Diluted weighted-average common shares outstanding	5,229	5,396
Earnings (loss) per common share
Basic	$ 0.51	$ (0.05)
Diluted	$ 0.51	$ (0.05)

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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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