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Consolidated Statement of Changes in Stockholders' Equity - 9 months ended Sep. 30, 2015 - USD ($) | Total | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Income [Member]
--- | --- | --- | --- | --- | --- | ---
BALANCE at Dec. 31, 2014 | $ 55,887,787 | $ 12,000 | $ 2,965,783 | $ 42,508,429 | $ 10,704,776 | $ (303,201)
BALANCE (in shares) at Dec. 31, 2014 |  |  | 2,965,783 |  |  |
Stock option compensation expense | 10,968 | 0 | $ 0 | 10,968 | 0 | 0
Issuance of common stock | 14,046,248 | $ 0 | $ 936,419 | 13,109,829 | 0 | 0
Issuance of common stock (in shares) |  |  | 936,419 |  |  |
Issuance of stock grants | 100,216 |  | $ 6,659 | 93,557 | 0 | 0
Issuance of stock grants (in shares) |  | 0 | 6,659 |  |  |
Stock issuance costs | (840,418) | $ 0 | $ 0 | (840,418) | 0 | 0
Exercise of stock options | 133,932 | 0 | $ 13,542 | 120,390 | 0 | 0
Exercise of stock options (in shares) |  |  | 13,542 |  |  |
Shares retained by shareholders of Cornerstone Bancshares, Inc. | 28,435,075 | 0 | $ 1,660,836 | 26,774,239 | 0 | 0
Shares retained by shareholders of Cornerstone Bancshares, Inc. (in shares) |  |  | 1,660,836 |  |  |
Cash dividends on preferred stock | (90,000) |  | $ 0 | 0 | (90,000) | 0
Conversion shares issued to shareholders of SmartFinancial, Inc. | $ 0 |  | $ 148,904 | (148,904) | 0 | 0
Conversion shares issued to shareholders of SmartFinancial, Inc. (in shares) | 0 |  | 148,904 |  |  |
Net income | $ 327,585 | 0 | $ 0 | 0 | 327,585 | 0
Unrealized holding gains on securities available for sale, net of reclassification adjustment | 424,963 | 0 | 0 | 0 | 0 | 424,963
BALANCE at Sep. 30, 2015 | $ 98,436,356 | $ 12,000 | $ 5,732,143 | $ 81,628,090 | $ 10,942,361 | $ 121,762
BALANCE (in shares) at Sep. 30, 2015 |  |  | 5,732,143 |  |  |

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