Earnings Applicable to Common Stockholders (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share Basic [Line Items]
Net income available to common stock holders, basic	$ 1,944,000	$ 1,321,000
Net income available to common stock holders, diluted	$ 1,944,000	$ 1,321,000
Effect of dilutive shares:
Weighted average number of shares outstanding, basic	5,358,576	5,140,500
Effect of dilutive shares: Restricted stock grants	56,524	49,429
Weighted average number of shares outstanding, diluted	5,415,100	5,189,929
Basic per share	$ 0.36us-gaap_EarningsPerShareBasic	$ 0.26us-gaap_EarningsPerShareBasic
Diluted per share	$ 0.36us-gaap_EarningsPerShareDiluted	$ 0.25us-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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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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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