Quarterly report pursuant to Section 13 or 15(d)

Warrant Liability (Tables)

v3.19.2
Warrant Liability (Tables)
6 Months Ended
Jun. 30, 2019
Warrant Liability [Abstract]  
Schedule of Warrant Activity
A summary of the Company's warrant activity during the six months ended June 30, 2019 and related information follows: 
Number of Shares Under Warrant Range of Warrant Exercise Price per Share Weighted Average Exercise Price Weighted Average Remaining Contractual Life (Years)
Balance at January 1, 2019 3,426,711  $ 1.50  $ 2.80  $ 2.48  4.53
Granted 8,242,500  $ 1.10  $ 1.75  $ 1.51  — 
Exercised (1,413,018) $ 1.10  $ 1.50  $ 1.10  — 
Expired —  $ —  $ —  $ —  — 
Balance at June 30, 2019 10,256,193  $ 1.10  $ 2.80  $ 1.89  4.54
Vested and Exercisable at June 30, 2019 10,256,193  $ 1.10  $ 2.80  $ 1.89  4.54
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,
2019 2018
Risk-free interest rate 0.95%    to 2.24  % 0.95%    to 2.24  %
Volatility 70.18%    to 89.11  % 70.18%    to 89.11  %
Expected life (years) 5 to 6.25 5 to 6.25
Expected dividend yield —%    —%