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Net Income Per Share - Basic and Diluted Net Income Per Share Calculations (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Basic shares	6,134,808us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	6,121,375us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive shares	177,050us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	10,750us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted shares	6,311,858us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	6,132,125us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Net income	$ 836us-gaap_ProfitLoss	$ 774us-gaap_ProfitLoss
Basic net income per share	$ 0.14us-gaap_EarningsPerShareBasic	$ 0.13us-gaap_EarningsPerShareBasic
Diluted net income per share	$ 0.13us-gaap_EarningsPerShareDiluted	$ 0.13us-gaap_EarningsPerShareDiluted

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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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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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