| Summary of changes in outstanding stock options |
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Weighted
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Average
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Grant
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Weighted
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Remaining
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Date
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Average
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Contractual Term
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Shares
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Fair Value
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Price
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(as of December 31, 2017)
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Balance, December 31, 2015
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445,417
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$
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26.20
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6.9
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Granted
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425,000
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$
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0.78
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4.00
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8.6
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Forfeited or cancelled
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(341,667)
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24.12
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6.8
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Balance, December 31, 2016
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528,750
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9.57
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8.1
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Non-exercisable
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(288,750)
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4.00
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8.9
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Outstanding and exercisable, December 31, 2016
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240,000
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16.28
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7.2
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Balance, December 31, 2016
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528,750
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$
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9.57
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8.1
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Granted
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37,500
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$
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0.58
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4.00
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8.4
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Forfeited or cancelled
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(42,500)
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4.00
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7.7
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Balance, December 31, 2017
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523,750
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9.63
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7.2
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Non-exercisable
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(148,333)
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4.00
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8.3
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Outstanding and exercisable, December 31, 2017
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375,417
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11.85
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6.7
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