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Quarterly Data (unaudited) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Interest income | $ 5,174,178 | $ 4,735,311 | $ 4,817,353 | $ 4,626,037 | $ 5,001,095 | $ 5,114,358 | $ 5,159,803 | $ 5,218,480 | $ 19,352,879 | $ 20,493,736 | $ 25,211,428
Interest expense | 1,081,424 | 1,172,398 | 1,217,231 | 1,313,774 | 1,405,101 | 1,510,208 | 1,690,837 | 1,755,722 | 4,784,827 | 6,361,868 | 9,201,814
Net interest income before provision for loan losses | 4,092,754 | 3,562,913 | 3,600,122 | 3,312,263 | 3,595,994 | 3,604,150 | 3,468,966 | 3,462,758 | 14,568,052 | 14,131,868 | 16,009,614
Provision for loan losses | 330,000 | 100,000 | 0 | 0 | 300,000 | 115,000 | 15,000 | 15,000 | 430,000 | 445,000 | 7,291,000
Net interest income after provision for loan losses | 3,762,754 | 3,462,913 | 3,600,122 | 3,312,263 | 3,295,994 | 3,489,150 | 3,453,966 | 3,447,758 | 14,138,052 | 13,686,868 | 8,718,614
Noninterest income | 241,420 | 258,652 | 252,022 | 267,386 | 273,665 | 323,412 | 316,053 | 269,757 | 1,019,480 | 1,182,887 | 3,080,929
Noninterest expenses | 3,477,359 | 3,203,019 | 3,423,359 | 3,074,132 | 3,500,712 | 3,076,769 | 3,657,407 | 3,416,615 | 13,177,869 | 13,651,503 | 18,042,361
Income before income taxes | 526,815 | 518,546 | 428,785 | 505,517 | 68,947 | 735,793 | 112,612 | 300,900 | 1,979,663 | 1,218,252 | (6,242,818)
Income tax (benefit) expense | (156,100) | (154,300) | (118,200) | (149,000) | 43,875 | (212,125) | 28,675 | (48,625) | 577,600 | 188,200 | (1,535,297)
Net income (loss) | 370,715 | 364,246 | 310,585 | 356,517 | 112,822 | 523,668 | 141,287 | 252,275 | 1,402,063 | 1,030,052 | (4,707,521)
Preferred stock dividend requirements | 375,000 | 308,893 | 280,031 | 265,856 | 252,493 | 187,538 | 118,013 | 93,075 | 1,229,780 | 651,119 | 34,463
Accretion on preferred stock dividends | 17,845 | 16,370 | 15,241 | 14,468 | 14,299 | 13,419 | 9,000 | 0 | 63,924 | 36,718 | 0
Net income (loss) available to common stockholders | $ (22,130) | $ 38,983 | $ 15,313 | $ 76,193 | $ (153,970) | $ 322,711 | $ 14,274 | $ 159,200 | $ 108,359 | $ 342,215 | $ (4,741,984)
Earnings (loss) per common share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0 | $ 0.01 | $ 0 | $ 0.01 | $ (0.02) | $ 0.05 | $ 0 | $ 0.02 | $ 0.02 | $ 0.05 | $ (0.73)
Diluted (in dollars per share) | $ 0 | $ 0.01 | $ 0 | $ 0.01 | $ (0.02) | $ 0.05 | $ 0 | $ 0.02 | $ 0.02 | $ 0.05 | $ (0.73)

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