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Supplemental disclosure of cash flow and non-cash investing and financing activities (Tables) | 9 Months Ended
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Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract] |
Supplemental Disclosure of Cash Flow and Non-cash Investing and Financing Activities | Selected cash payments, receipts, and noncash activities are as follows:
| Nine Months Ended September 30,
| 2013 |  | 2012
Cash paid for interest | $ | 22,971 |  |  | $ | 8,738 |
Income taxes paid | 96,967 |  |  | — |
Purchases of property, plant and equipment financed capital leases | 107,259 |  |  | 83,016 |
Stock issuance of 167,086 shares in lieu of Director's fees | — |  |  | 184,653 |
Beneficial conversion related to line of credit with related party | — |  |  | 514,456 |
Stock issuance in connection with Earn-Out Liability of 1,174, 915 shares for 2013 and |  |  |
2,632,576 shares for 2012 | 5,792,330 |  |  | 3,185,223 |
Stock issuance of 5,272,004 shares in exchange for convertible debt | 5,272,004 |  |  | — |
Company issued shares of 167,183 for cashless exercise | — |  |  | 167 |
Stock issuance of 893,267 shares in payment of Convertible Secured Promissory Notes related to acquisition of Surgical Biologics | — |  |  | 893,267 |
Tenant improvement incentive | 996,866 |  |  | — |

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