Dilutive Securities, Common Shares Attributable to Conversion of Debt Securities, Effect on Basic Earnings Per Share

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- Definition

Senior Convertible Debentures Income

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- Definition

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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- Definition

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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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method.

+ References

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- Definition

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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Price of a single share of a number of saleable stocks of a company.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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Significant Accounting Policies (Earnings Per Share - Effects of dilutive options and warrants) (Details) (USD $)	3 Months Ended								9 Months Ended			12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic EPS
Income	$ 1,211,000	$ 1,601,000	$ 1,367,000	$ 1,192,000	$ 1,109,000	$ 912,000	$ 769,000	$ 561,000	$ 4,178,220	$ 2,789,793	$ 1,624,949	$ 5,370,740	$ 3,351,162	$ 1,944,896
Shares	2,944,001	2,944,001	2,944,001	2,944,001	2,944,001	2,944,001	2,944,001	2,944,001			2,944,001	2,944,001	2,944,001
Per Share Amounts	$ 0.41us-gaap_EarningsPerShareBasic	$ 0.54us-gaap_EarningsPerShareBasic	$ 0.46us-gaap_EarningsPerShareBasic	$ 0.41us-gaap_EarningsPerShareBasic	$ 0.38us-gaap_EarningsPerShareBasic	$ 0.31us-gaap_EarningsPerShareBasic	$ 0.26us-gaap_EarningsPerShareBasic	$ 0.19us-gaap_EarningsPerShareBasic	$ 1.42us-gaap_EarningsPerShareBasic	$ 0.95us-gaap_EarningsPerShareBasic	$ 0.55us-gaap_EarningsPerShareBasic	$ 1.82us-gaap_EarningsPerShareBasic	$ 1.14us-gaap_EarningsPerShareBasic	$ 0.66us-gaap_EarningsPerShareBasic
Senior Convertible Debentures Income													301,766sfdl_SeniorConvertibleDebenturesIncome
Effect of Diluted Securities:
Senior Convertible Debentures													304,200
Senior Convertible Debentures (per Share)													$ (0.02)
Diluted EPS
Income													$ 3,652,928
Shares	3,248,201	3,248,201	3,248,201		3,248,201	3,248,201	3,248,201	3,248,201			2,944,001	3,248,201	3,248,201
Per Share Amounts	$ 0.40us-gaap_EarningsPerShareDiluted	$ 0.52us-gaap_EarningsPerShareDiluted	$ 0.44us-gaap_EarningsPerShareDiluted	$ 0.39us-gaap_EarningsPerShareDiluted	$ 0.36us-gaap_EarningsPerShareDiluted	$ 0.30us-gaap_EarningsPerShareDiluted	$ 0.26us-gaap_EarningsPerShareDiluted	$ 0.20us-gaap_EarningsPerShareDiluted	$ 1.36us-gaap_EarningsPerShareDiluted	$ 0.93us-gaap_EarningsPerShareDiluted	$ 0.55us-gaap_EarningsPerShareDiluted	$ 1.75us-gaap_EarningsPerShareDiluted	$ 1.12us-gaap_EarningsPerShareDiluted	$ 0.66us-gaap_EarningsPerShareDiluted
Weighted Average [Member]
Diluted EPS
Share Price	$ 14.56				$ 11.37			$ 8.63	$ 14.56	$ 11.37		$ 14.56	$ 11.37