Quarterly report pursuant to Section 13 or 15(d)

Equity (Tables)

v3.19.2
Equity (Tables)
6 Months Ended
Jun. 30, 2019
Equity [Abstract]  
Summary of Option Activity
The following is a summary of option activities for the six months ended June 30, 2019:

Number of
Shares
Weighted
Average
Grant Date
Fair Value
Weighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual
Term
(in years) #
Aggregate
Intrinsic
Value
Outstanding, December 31, 2018 2,794,000  $ 1.78  $ 2.61  9.43 $ 21,200 
Granted 45,000  $ 0.80  $ 1.15 
Exercised (25,000) $ 0.13  $ 0.20 
Outstanding, June 30, 2019 2,814,000  $ 1.80  $ 2.63  8.42 $ 6,800 
Exercisable, June 30, 2019 839,333  $ 2.11  $ 3.15  8.15 $ 6,800 
Schedule of Assumptions Used
The assumptions used in the BSM models for its outstanding warrants are as follows:

Six Months Ended June 30, 2019 Year Ended December 31, 2018
Risk-free interest rate 1.73  % to 2.39  % 2.46  % to 2.51  %
Volatility 75.00  % to 85.00  % 75.00  % to 80.00  %
Expected life (years) 2.62 to 5.01 3.12 to 4.98
Dividend yield —%    —%   
Components of Share-Based Compensation
Stock-based compensation for the three and six months ended June 30, 2019 and 2018, are as follows (in thousands):
Three Months Ended June 30, Six Months Ended June 30,
2019 2018 2019 2018
General and administrative
$ 271  $ 293  $ 573  $ 502 
Research and development
47  46  93  79 
Total
$ 318  $ 339  $ 666  $ 581