Stock-Based Compensation (Tables)
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6 Months Ended |
Jun. 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 June 30,
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Six Months Ended June 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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175,666
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$
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97,605
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$
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365,705
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$
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178,516
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Research and development
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96,300
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34,913
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178,647
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82,352
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Total
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$
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271,966
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$
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132,518
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$
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544,352
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$
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260,868
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| Schedule Of Assumptions Made In Calculating The Fair Value Of Options |
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Six Months Ended June 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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77-80
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%
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92-97
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%
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Risk free interest rate
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1.3-1.7
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%
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1.5-1.7
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%
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Expected term (in years)
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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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3,726,316
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0.71
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1,398,499
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1.07
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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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(1,431,879)
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0.80
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-
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-
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Cancelled
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-
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-
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-
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-
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Outstanding at June 30
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12,805,815
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$
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0.89
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10,306,601
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$
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0.94
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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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June 30, 2015
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12,805,815
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$
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0.89
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7.1 years
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$
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597,200
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Exercisable at
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June 30, 2015
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6,811,550
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$
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1.01
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5.1 years
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$
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505,700
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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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3,726,316
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$
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0.49
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Vested
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(965,550)
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$
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0.59
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Cancelled
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-
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$
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-
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Unvested at June 30, 2015
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5,994,265
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$
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0.54
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