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Earnings per Share - Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income(Loss), Basic		$ 4,924	$ (655)	$ 5,589	$ (2,575)
Net Income(Loss), Diluted		$ 4,924	$ (655)	$ 5,589	$ (2,575)
Weighted Average Number of Shares Outstanding, Basic		2,293,964	2,311,873	2,294,444	2,314,704
Weighted Average Number of Shares Outstanding, Options	[1]	753,594		751,357
Weighted Average Number of Shares Outstanding, Diluted		3,047,558	2,311,873	3,045,801	2,314,704
Per Share Amount, Basic		$ 2.15	$ (0.28)	$ 2.44	$ (1.11)
Per Share Amount, Diluted		$ 1.62	$ (0.28)	$ 1.83	$ (1.11)
[1] The effect of the 767,500 outstanding stock options is antidilutive for the nine and three months ended September 30, 2015 due to net loss reported for those periods.

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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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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