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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net loss | $ (20,894,256)us-gaap_NetIncomeLoss | $ (9,183,118)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash flows used in operating activities: |  |
Depreciation | 6,881 us-gaap_Depreciation | 7,122 us-gaap_Depreciation
Amortization of intangible assets | 6,691 us-gaap_AmortizationOfIntangibleAssets | 5,946 us-gaap_AmortizationOfIntangibleAssets
Provision for doubtful accounts | 13,004 us-gaap_ProvisionForDoubtfulAccounts | 6,046 us-gaap_ProvisionForDoubtfulAccounts
Stock based compensation | 704,872 us-gaap_ShareBasedCompensation | 1,009,526 us-gaap_ShareBasedCompensation
Amortization of deferred financing costs |  | 260,027 us-gaap_AmortizationOfDeferredCharges
Stock based expense for services | 135,592 us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims | 314,291 us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
Changes in operating assets and liabilities: |  |
Accounts receivable | (502,836)us-gaap_IncreaseDecreaseInAccountsReceivable | (654,748)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventory | 222,925 us-gaap_IncreaseDecreaseInInventories | 122,933 us-gaap_IncreaseDecreaseInInventories
Other current assets | 91,412 us-gaap_IncreaseDecreaseInOtherCurrentAssets | (85,834)us-gaap_IncreaseDecreaseInOtherCurrentAssets
Other assets | (9,842)us-gaap_IncreaseDecreaseInOtherOperatingAssets | (9,154)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable | (91,946)us-gaap_IncreaseDecreaseInAccountsPayable | 954,513 us-gaap_IncreaseDecreaseInAccountsPayable
Deferred revenue | (522,613)us-gaap_IncreaseDecreaseInDeferredRevenue | (124,271)us-gaap_IncreaseDecreaseInDeferredRevenue
Accrued expenses and other current liabilities | 1,038,813 us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities | (1,329,216)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Other long-term liabilities | 651,567 us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities |
Net cash flows used in operating activities | (19,149,736)us-gaap_NetCashProvidedByUsedInOperatingActivities | (8,705,937)us-gaap_NetCashProvidedByUsedInOperatingActivities
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Patent costs | (36,853)us-gaap_PaymentsToAcquireIntangibleAssets | (97,284)us-gaap_PaymentsToAcquireIntangibleAssets
Purchase of property and equipment |  | (23,692)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash flows used in investing activities | (36,853)us-gaap_NetCashProvidedByUsedInInvestingActivities | (120,976)us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Proceeds from sale of common stock, net of costs | 59,117,827 us-gaap_ProceedsFromIssuanceOfCommonStock |
Proceeds from exercise of options | 7,208 us-gaap_ProceedsFromStockOptionsExercised | 40,055 us-gaap_ProceedsFromStockOptionsExercised
Proceeds from exercise of warrants | 358,400 us-gaap_ProceedsFromWarrantExercises |
Net cash flows provided by financing activities | 59,483,435 us-gaap_NetCashProvidedByUsedInFinancingActivities | 40,055 us-gaap_NetCashProvidedByUsedInFinancingActivities
Increase (decrease) in cash | 40,296,846 us-gaap_CashPeriodIncreaseDecrease | (8,786,858)us-gaap_CashPeriodIncreaseDecrease
Cash, beginning of period | 51,361,607 us-gaap_Cash | 54,191,260 us-gaap_Cash
Cash, end of period | $ 91,658,453 us-gaap_Cash | $ 45,404,402 us-gaap_Cash

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