Annual report pursuant to Section 13 and 15(d)

Warrant Liability (Tables)

v3.10.0.1
Warrant Liability (Tables)
12 Months Ended
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Warrant Activity
A summary of our February 2017 Warrant activity and related information follows:
Description 
Number of
Shares Under
Warrant
Range of Warrant Price per Share 
Weighted
Average
Exercise  Price
Weighted Average
Remaining
Contractual Life (Years)
Balance at December 31, 2017 419,772  $ 1.50  $ 1.46  4.38
Granted —  — 
Exercised (9,752) $ 1.50  $ 1.50 
Expired —  — 
Balance at December 31, 2018 410,020  $ 1.50  $ 1.50  3.13
Vested and Exercisable - December 31, 2018 410,020  $ 1.50  $ 1.50  3.13
Schedule of Assumptions Used
The fair value of the option grants has been estimated, with the following weighted-average assumptions:

Year Ended December 31,
2018 2017
Risk-free interest rate 0.95  % to    2.24%    1.83  % to    1.95%   
Volatility 70.18%    to    89.11%    80%   
Expected life (years) 5.0 to 6.25 5.0 to 6.25
Expected dividend yield —%    —%   
February 2017 Issuance  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Assumptions Used
The assumptions used in the BSM and MCM models for the February 2017 Warrants are as follows:

Year Ended December 31,
2018 2017
Risk-free interest rate  2.46%    1.68  % to  1.86%   
Volatility  75.0%    80.0  % to  160.11%   
Expected life (years)  3.12 0.5 to  5.00
Dividend yield  —%    —%