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Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands | Total | Common stock | Preferred stock | Additional paid-in capital | Accumulated other comprehensive income (loss) | Retained earnings | Nonvested restricted stock
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 109,872 | $ 65 |  | $ 73,371 | $ (504) | $ 37,540 | $ (600)
Balance, shares at Dec. 31, 2016 |  | 6,463,789 |  |  |  |  |
Net income | 6,716 |  |  |  |  | 6,716 |
Net issuance of common stock | 24,758 |  |  | 24,750 |  |  |
Net issuance of common stock, shares |  | 805,000 |  |  |  |  |
Proceeds from exercise of stock options | 416 | $ 8 |  | 416 |  |  |
Proceeds from exercise of stock options, shares |  | 42,267 |  |  |  |  |
Issuance of restricted stock |  |  |  | 146 |  |  | (146)
Issuance of restricted stock, shares |  | 3,125 |  |  |  |  |
Amortization of deferred compensation on restricted stock | 159 |  |  |  |  |  | 159
Compensation expense related to stock options, net of tax | 491 |  |  | 491 |  |  |
Other comprehensive income | 324 |  |  |  | 324 |  |
Balance at Jun. 30, 2017 | 142,736 | $ 73 |  | 99,174 | (180) | 44,256 | (587)
Balance, shares at Jun. 30, 2017 |  | 7,314,181 |  |  |  |  |
Balance at Dec. 31, 2017 | 149,686 | $ 73 |  | 99,986 | (456) | 50,585 | (502)
Balance, shares at Dec. 31, 2017 |  | 7,347,851 |  |  |  |  |
Net income | 10,724 |  |  |  |  | 10,724 |
Proceeds from exercise of stock options | 638 | $ 1 |  | 637 |  |  |
Proceeds from exercise of stock options, shares |  | 66,321 |  |  |  |  |
Issuance of restricted stock |  |  |  | 501 |  |  | (501)
Issuance of restricted stock, shares |  | 11,500 |  |  |  |  |
Amortization of deferred compensation on restricted stock | 150 |  |  |  |  |  | 150
Compensation expense related to stock options, net of tax | 567 |  |  | 567 |  |  |
Other comprehensive income | (909) |  |  |  | (909) |  |
Balance at Jun. 30, 2018 | $ 160,856 | $ 74 |  | $ 101,691 | $ (1,365) | $ 61,309 | $ (853)
Balance, shares at Jun. 30, 2018 |  | 7,425,672 |  |  |  |  |

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