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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Cash flows from operating activities: |  |
Net income (loss) | $ (2,684,915) | $ (6,057,092)
Adjustments to reconcile net income (loss) to net cash from operating activities: |  |
Depreciation | 414,165 | 354,425
Loss on fixed asset disposal | 8,359 | 0
Amortization of intangible assets | 789,809 | 1,117,646
Impairment of intangible assets | 0 | 1,798,495
Amortization of debt discount and deferred financing costs | 1,328,439 | 1,222,290
Share-based compensation | 4,155,005 | 1,755,669
Change in fair value of earn-out liability | 0 | 1,320,000
Increase (decrease) in cash resulting from changes in: |  |
Accounts receivable | (6,052,963) | (4,278,205)
Inventory | (1,510,278) | (1,089,733)
Prepaid expenses | (913,644) | (382,051)
Other assets | 70,000 | 19,213
Accounts payable | 954,094 | (39,139)
Accrued compensation | 1,807,143 | 1,393,016
Accrued expenses | 419,462 | 92,986
Accrued interest | (41,641) | 312,775
Other liabilities | 132,302 | (1,408)
Net cash flows from operating activities | (1,124,663) | (2,461,113)
Cash flows from investing activities: |  |
Purchases of equipment | (2,008,407) | (401,864)
Patent application costs | (526,566) | 0
Net cash flows from investing activities | (2,534,973) | (401,864)
Cash flows from financing activities: |  |
Proceeds from exercise of warrants | 1,480,124 | 5,925,539
Proceeds from exercise of stock options | 1,516,580 | 885,034
Repayment of convertible debt related to acquisition | 0 | (427,126)
Principal payments of equipment leases | (29,797) | (11,002)
Repurchase of warrants | 0 | (568)
Net cash flows from financing activities | 2,966,907 | 6,371,877
Net change in cash | (692,729) | 3,508,900
Cash and cash equivalents, beginning of period | 6,754,485 | 4,112,326
Cash and cash equivalents, end of period | $ 6,061,756 | $ 7,621,226

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