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v2.4.1.9

Consolidated Statements of Cash Flows (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Cash flows from operating activities: |  |  |
Net loss | $ (2,733,555)us-gaap_NetIncomeLoss | $ (2,284,943)us-gaap_NetIncomeLoss | $ (2,135,140)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 69,037 us-gaap_DepreciationDepletionAndAmortization | 78,862 us-gaap_DepreciationDepletionAndAmortization | 93,643 us-gaap_DepreciationDepletionAndAmortization
Stock-based compensation expense, including common stock issued for services | 479,103 us-gaap_ShareBasedCompensation | 402,104 us-gaap_ShareBasedCompensation | 310,076 us-gaap_ShareBasedCompensation
Changes in assets and liabilities: |  |  |
Grant funds receivable | 61,568 us-gaap_IncreaseDecreaseInReceivables | 125,339 us-gaap_IncreaseDecreaseInReceivables | (82,733)us-gaap_IncreaseDecreaseInReceivables
Prepaid expenses and other current assets | (934)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (1,268)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (12,593)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable and accrued expenses | (125,326)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | (14,686)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | (614,500)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Total adjustments | 483,448 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities | 590,351 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities | (306,107)us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities
Net cash used in operating activities | (2,250,107)us-gaap_NetCashProvidedByUsedInOperatingActivities | (1,694,592)us-gaap_NetCashProvidedByUsedInOperatingActivities | (2,441,247)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (35,503)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (86,603)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
Net cash used in investing activities | (35,503)us-gaap_NetCashProvidedByUsedInInvestingActivities | (86,603)us-gaap_NetCashProvidedByUsedInInvestingActivities |
Cash flows from financing activities: |  |  |
Proceeds from sale of common stock | 873,400 us-gaap_ProceedsFromIssuanceOfCommonStock | 1,643,333 us-gaap_ProceedsFromIssuanceOfCommonStock | 310,160 us-gaap_ProceedsFromIssuanceOfCommonStock
Proceeds from sale of preferred stock |  | 1,615,798 us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock | 1,999,032 us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
Net cash provided in financing activities | 873,400 us-gaap_NetCashProvidedByUsedInFinancingActivities | 3,259,131 us-gaap_NetCashProvidedByUsedInFinancingActivities | 2,309,192 us-gaap_NetCashProvidedByUsedInFinancingActivities
Net increase (decrease) in cash and cash equivalents | (1,412,210)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 1,477,936 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (132,055)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period | 2,513,861 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,035,925 us-gaap_CashAndCashEquivalentsAtCarryingValue | 1,167,980 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period | $ 1,101,651 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 2,513,861 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 1,035,925 us-gaap_CashAndCashEquivalentsAtCarryingValue

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- Definition The sum of adjustments which are added to or deducted from net income or loss, including the portion attributable to noncontrolling interest, to reflect cash provided by or used in operating activities, in accordance with the indirect cash flow method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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