Stock-Based Compensation (Tables)
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9 Months Ended |
Sep. 30, 2015 |
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| Stock-Based Compensation [Abstract] |
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| Summary Of Stock Compensation Expense |
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Three Months Ended September 30,
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Nine Months Ended September 30,
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2015
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2014
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2015
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2014
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Statement of operations line item:
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General and administrative
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$
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127,203
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$
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128,945
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$
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492,908
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$
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307,461
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Research and development
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98,113
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34,246
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276,760
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116,598
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Total
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$
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225,316
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$
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163,191
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$
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769,668
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$
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424,059
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| Schedule Of Assumptions Made In Calculating The Fair Value Of Options |
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Nine Months Ended September 30,
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2015
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2014
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Black-Scholes assumptions
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Expected dividend yield
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0
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%
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0
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%
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Expected volatility
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72-80
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%
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92-96
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%
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Risk free interest rate
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1.2-1.7
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%
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1.49-1.75
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%
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Expected term (in years)
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5-6 years
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5 years
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| Summary Of Employee And Non-Employee Transactions |
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2015
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2014
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Number of Options
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Weighted Average Exercise Price
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Number of Options
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Weighted Average Exercise Price
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Outstanding at
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January 1
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11,400,806
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$
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0.93
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9,356,795
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$
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0.92
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Granted
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4,201,316
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0.69
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2,398,499
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0.97
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Exercised
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(889,428)
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0.80
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(448,693)
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0.80
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Expired
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(1,741,879)
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1.19
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(35,795)
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0.24
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Cancelled
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(146,083)
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0.81
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-
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-
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Outstanding at September 30
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12,824,732
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$
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0.83
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11,270,806
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$
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0.93
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| Summary Of Stock Options Outstanding |
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Number of Options
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Weighted Average Exercise Price
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Weighted Average Remaining Contractual Term
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Aggregate Intrinsic Value
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Outstanding at
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September 30, 2015
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12,824,732
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$
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0.83
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7.1 years
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$
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360,000
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Exercisable at
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September 30, 2015
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6,788,800
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$
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0.91
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5.2 years
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$
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305,000
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Outstanding at
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December 31, 2014
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11,400,806
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$
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0.93
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5.2 years
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$
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842,300
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Exercisable at
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December 31, 2014
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8,167,307
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$
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0.97
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3.6 years
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$
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613,550
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| Summary Of Unvested Shares |
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2015
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Number of Options
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Weighted Average Fair Value at Grant Date
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Unvested at January 1, 2015
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3,233,499
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$
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0.60
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Granted
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4,201,316
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$
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0.47
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Vested
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(1,253,050)
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$
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0.59
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Cancelled
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(145,833)
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$
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0.57
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Unvested at September 30, 2015
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6,035,932
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$
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0.51
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