Quarterly report pursuant to Section 13 or 15(d)

Equity (Tables)

v3.10.0.1
Equity (Tables)
6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Summary of Option Activity
The following is a summary of option activities for the six months ended June 30, 2018:

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, 2017 1,345,000  $ 1.93  $ 3.50  9.07 $ 83,000 
Granted 1,409,000  $ 1.29  $ 1.81 
Outstanding, June 30, 2018 2,754,000  $ 1.80  $ 2.64  8.77 $ 91,650 
Exercisable, June 30, 2018 200,000  $ 2.60  $ 4.81  1.92 $ 79,500 
Schedule of Assumptions Used
The fair value of the option grants has been estimated, with the following weighted-average assumptions:

Six Months Ended June 30,
2018  2017 
Risk-free interest rate 0.95% - 2.24% 1.3% - 2.24%
Volatility 70.18% - 89.11% 70.18% - 89.11%
Expected life (years) 5 to 6.25 6 to 6.25
Expected dividend yield —  — 
Components of Share-Based Compensation
Stock-based compensation for the six months ended June 30, 2018 and 2017, are as follows (in thousands):

3 Months Ended June 30, Six Months Ended June 30,
2018  2017  2018  2017 
General and administrative $ 293  $ 108  $ 502  $ 216 
Research and development 46  79 
Total $ 339  $ 110  $ 581  $ 219