Stock-Based Compensation (Tables)
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3 Months Ended |
12 Months Ended |
Mar. 31, 2020 |
Dec. 31, 2019 |
| Stock-Based Compensation [Abstract] |
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| Summary Of Stock Compensation Expense |
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For the Three Months Ended
March 31,
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2020
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2019
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Statement of operations line item:
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General and administrative
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$
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72,420
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$
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116,679
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Research and development
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3,882
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44,321
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Total
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$
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76,302
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$
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161,000
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For the Year Ended
December 31,
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2019
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2018
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Statement of operations line item:
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General and administrative
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$
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393,483
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$
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883,855
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Research and development
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63,267
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344,480
|
|
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Total
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$
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456,750
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$
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1,228,335
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| Schedule Of Assumptions Made In Calculating The Fair Value Of Options |
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For the Year Ended December 31,
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2019
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2018
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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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74-75
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%
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69-73
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%
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Risk-free interest rate
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1.9-2.6
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%
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2.3-2.9
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%
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Expected term (in years)
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5.5-6 years
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5.5-6 years
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| Summary Of Share-Based Transactions |
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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, January 1, 2020
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204,574
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$
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35.60
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7.3 years
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$
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-
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Granted
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-
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$
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-
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Exercised
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-
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$
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-
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Expired
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(2,498)
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$
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159.60
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Cancelled
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(53,054)
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$
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60.40
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Outstanding, March 31, 2020
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149,022
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$
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24.69
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7.8 years
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$
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-
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Exercisable, March 31, 2020
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75,304
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$
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37.16
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7.0 years
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$
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-
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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, January 1, 2019
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255,922
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$
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41.88
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7.8 years
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$
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-
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Granted
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52,465
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$
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6.41
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Exercised
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-
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$
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-
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Expired
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(2,080)
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$
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97.78
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Cancelled
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(101,733)
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$
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34.99
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Outstanding, December 31, 2019
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204,574
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$
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35.60
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7.3 years
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$
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-
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Exercisable, December 31, 2019
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123,263
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$
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51.15
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6.2 years
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$
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-
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| Summary Of Unvested Shares |
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2020
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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, 2020
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81,311
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$
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7.90
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Granted
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-
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$
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-
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Vested
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(7,593)
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$
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8.34
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Cancelled
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-
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$
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-
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Unvested at March 31, 2020
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73,718
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$
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7.85
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2019
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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, 2019
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131,531
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$
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13.19
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Granted
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52,465
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$
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4.20
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Vested
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(51,386)
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$
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14.12
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Cancelled
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(51,299)
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$
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11.47
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Unvested at December 31, 2019
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81,311
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$
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7.90
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| Summary Of RSU Activity |
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Number of RSUs
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Weighted Average Grant Date Fair Value
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Outstanding, January 1, 2019
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1,394
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$
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22.08
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Granted
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-
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$
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-
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Vested and Released
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(464)
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$
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22.08
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Cancelled
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(930)
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$
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22.08
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Outstanding, December 31, 2019
|
-
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$
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-
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