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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member]
--- | --- | --- | --- | ---
BALANCE at Dec. 31, 2011 | $ 19,755,396 | $ 27,462 | $ 100,699,156 | $ (80,971,222)
BALANCE (in shares) at Dec. 31, 2011 |  | 27,462,504 |  |
Stock based compensation expense (employees and directors) | 52,677 | 0 | 52,677 | 0
Stock based compensation expense (employees and directors) (in shares) |  | 0 |  |
Exercise of stock options | 130,448 | 262 | 130,186 | 0
Exercise of stock options (in shares) | (261,763) | 261,763 |  |
Net loss | (2,260,086) | 0 | 0 | (2,260,086)
BALANCE at Dec. 31, 2012 | 17,678,435 | 27,724 | 100,882,019 | (83,231,308)
BALANCE,(in shares) at Dec. 31, 2012 |  | 27,724,267 |  |
Stock based compensation expense (employees and directors) | 19,053 | 0 | 19,053 | 0
Stock based compensation expense (employees and directors) (in shares) |  | 0 |  |
Exercise of stock options | 70,472 | 153 | 70,319 | 0
Exercise of stock options (in shares) | (153,200) | 153,200 |  |
Issuance of common stock | 12,600 | 20 | 12,580 | 0
Issuance of common stock (in shares) |  | 20,000 |  |
Net loss | (2,424,256) | 0 | 0 | (2,424,256)
BALANCE at Dec. 31, 2013 | $ 15,356,304 | $ 27,897 | $ 100,983,971 | $ (85,655,564)
BALANCE,(in shares) at Dec. 31, 2013 |  | 27,897,467 |  |

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