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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock | Paid-in Capital | Retained Earnings (Deficit) | Noncontrolling Interest
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 10,140 | $ 31 | $ 5,096 | $ 5,013 |
Balance, shares at Dec. 31, 2011 |  | 30,816,631 |  |  |
Issuance of common stock for business acquisition | 158 |  | 158 |  |
Issuance of common stock for business acquisition, shares |  | 266,478 |  |  |
Issuance of common stock for option exercise | 13 |  | 13 |  |
Issuance of common stock for option exercise, shares | 34,500 | 34,500 |  |  |
Issuance of common stock for cashless warrant exercise, shares | 5,625 | 5,625 |  |  |
Issuance of common stock for consulting services | 20 |  | 20 |  |
Issuance of common stock for consulting services, shares | 25,000 | 25,000 |  |  |
Employee stock-based compensation expense | 166 |  | 166 |  |
Issuance of noncontrolling interest in ZBC (Note2) | 10 |  |  |  | 10
Net income (loss) | 1,548 |  |  | 1,553 | (5)
Balance at Dec. 31, 2012 | 12,055 | 31 | 5,453 | 6,566 | 5
Balance, shares at Dec. 31, 2012 | 31,148,234 | 31,148,234 |  |  |
Issuance of common stock for option exercise, shares | 23,000 | 23,000 |  |  |
Employee stock-based compensation expense | 133 |  | 133 |  |
Net income (loss) | (7,340) |  |  | (7,301) | (39)
Balance at Dec. 31, 2013 | $ 4,848 | $ 31 | $ 5,586 | $ (735) | $ (34)
Balance, shares at Dec. 31, 2013 | 31,171,234 | 31,171,234 |  |  |

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