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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) (USD $) | Total | Convertible Preferred Stock Series A [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 20,007,302 | $ 0 | $ 88,423 | $ 89,627,601 | $ (25,000) | $ (69,683,722)
Balance (in shares) at Dec. 31, 2012 |  | 0 | 88,423,169 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation expense | 2,487,239 | 0 | 0 | 2,487,239 | 0 | 0
Exercise of stock options | 542,841 | 0 | 489 | 542,352 | 0 | 0
Exercise of stock options (in shares) | 489,197 | 0 | 489,197 |  |  |
Exercise of warrants | 1,167,624 | 0 | 997 | 1,166,627 | 0 | 0
Exercise of warrants (in shares) |  | 0 | 997,166 |  |  |
Common stock issued for 5% convertible note | 5,272,004 | 0 | 5,272 | 5,266,732 | 0 | 0
Common stock issued for 5% convertible note (in shares) | 5,272,004 | 0 | 5,272,004 |  |  |
Common stock issued for earn-out liability | 5,792,330 | 0 | 1,175 | 5,791,155 | 0 | 0
Common stock issued for earn-out liability (in shares) | 1,174,915 | 0 | 1,174,915 |  |  |
Net income (loss) | (2,377,797) | 0 | 0 | 0 | 0 | (2,377,797)
Balance at Jun. 30, 2013 | $ 32,891,543 | $ 0 | $ 96,356 | $ 104,881,706 | $ (25,000) | $ (72,061,519)
Balance (in shares) at Jun. 30, 2013 |  | 0 | 96,356,451 |  |  |

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