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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Treasury Stock | Accumulated Earnings (deficit) | Non-Controlling Interest
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ (3,802) | $ 31 | $ 6,032 | $ 0 | $ (9,776) | $ (89)
Balance, shares at Dec. 31, 2016 |  | 31,271,234 |  |  |  |
Stock option exercises | 39 |  | 39 |  |  |
Stock option exercises, shares |  | 41,143 |  |  |  |
Private Placement | 1,249 | $ 2 | 1,247 |  |  |
Private Placement, shares |  | 1,552,500 |  |  |  |
Stock-based compensation expense | 66 |  | 66 |  |  |
Service provider warrant expense | 228 |  | 228 |  |  |
Treasury stock | (243) |  |  | (243) |  |
Treasury stock, shares |  | (86,837) |  |  |  |
Common stock dividends declared | 0 |  |  |  |  |
Net income | 7,365 |  |  |  | 7,365 |
Balance at Dec. 31, 2017 | 4,902 | $ 33 | 7,612 | (243) | (2,411) | (89)
Balance, share at Dec. 31, 2017 |  | 32,778,040 |  |  |  |
Stock option exercises | 177 | $ 1 | 176 | 0 | 0 | 0
Stock option exercises, shares |  | 425,710 |  |  |  |
Stock-based compensation expense | 370 | $ 0 | 370 | 0 | 0 | 0
Treasury stock | $ (3,432) | $ 0 | 0 | (3,432) | 0 | 0
Treasury stock, shares | (932,383) | (932,383) |  |  |  |
Common stock dividends declared | $ (2,270) | $ 0 | 0 | 0 | (2,270) | 0
Net income | 9,552 | 0 | 0 | 0 | 9,552 | 0
Balance at Dec. 31, 2018 | $ 9,298 | $ 34 | $ 8,158 | $ (3,675) | $ 4,871 | $ (89)
Balance, share at Dec. 31, 2018 |  | 32,271,367 |  |  |  |

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