Derivative Warrants Liability (Tables)
|
12 Months Ended |
Dec. 31, 2018 |
|---|
| Derivative Warrants Liability [Abstract] |
|
| Schedule of outstanding warrants and terms |
| Issuance date |
|
Outstanding as of December 31, 2017 |
|
|
Outstanding as of December 31, 2018 |
|
|
Exercise
Price |
|
|
Exercisable as of
December 31, 2018 |
|
|
Exercisable Through |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Series (2015) |
|
|
3,106,000 |
|
|
|
1,502,500 |
|
|
$ |
0.5 |
|
|
|
1,502,500 |
|
|
April 2021 |
| Series (2016) |
|
|
2,853,406 |
|
|
|
2,628,406 |
|
|
$ |
0.5 |
|
|
|
2,628,406 |
|
|
May 2019 |
| Series (2018) |
|
|
- |
|
|
|
600,000 |
|
|
$ |
0.125 |
|
|
|
600,000 |
|
|
November 2021 |
| |
|
|
5,959,406 |
|
|
|
4,730,906 |
|
|
|
|
|
|
|
|
|
|
|
|
| Schedule of derivative warrant liabilities |
| |
|
As of
December 31, 2018 |
|
|
As of
December 31, 2017 |
|
| |
|
Series (2015) |
|
|
Series (2016) |
|
|
Series (2018) |
|
|
Series (2015) |
|
|
Series (2016) |
|
| Share price (U.S. dollars) |
|
$ |
0.094 |
|
|
$ |
0.094 |
|
|
$ |
0.094 |
|
|
$ |
0.59 |
|
|
$ |
0.59 |
|
| Exercise price (U.S. dollars) |
|
$ |
0.5 |
|
|
$ |
0.5 |
|
|
$ |
0.125 |
|
|
$ |
0.5 |
|
|
$ |
0.5 |
|
| Expected volatility |
|
|
63 |
% |
|
|
63 |
% |
|
|
63 |
% |
|
|
67 |
% |
|
|
67 |
% |
| Risk-free interest rate |
|
|
2.92 |
% |
|
|
2.92 |
% |
|
|
2.92 |
% |
|
|
1.0 |
% |
|
|
1.0 |
% |
| Dividend yield |
|
|
- |
|
|
|
- |
|
|
|
- |
|
|
|
- |
|
|
|
- |
|
| Expected term (years) |
|
|
2.4 |
|
|
|
0.47 |
|
|
|
2.88 |
|
|
|
0.37 |
|
|
|
0.77 |
|
|
| Schedule of stock options derivative warrant liabilities |
| |
|
Series (2015) |
|
|
Series (2016) |
|
|
Series (2018) |
|
|
Total |
|
| Balances at December 31, 2016 |
|
$ |
76,768 |
|
|
$ |
182,948 |
|
|
|
- |
|
|
$ |
259,716 |
|
| Exercised |
|
|
- |
|
|
|
(297,200 |
) |
|
|
- |
|
|
|
(297,200 |
) |
| Changes in fair value |
|
|
477,648 |
|
|
|
623,581 |
|
|
|
- |
|
|
|
1,101,229 |
|
| Balances at December 31, 2017 |
|
$ |
554,416 |
|
|
$ |
509,329 |
|
|
|
- |
|
|
$ |
1,063,745 |
|
| Amount classified to equity upon exercise |
|
|
(88,803 |
) |
|
|
(40,162 |
) |
|
|
- |
|
|
|
(128,965 |
) |
| expired |
|
|
(178,498 |
) |
|
|
- |
|
|
|
- |
|
|
|
(178,498 |
) |
| Issued |
|
|
- |
|
|
|
- |
|
|
|
19,655 |
|
|
|
19,655 |
|
| Changes in fair value |
|
|
(281,119 |
) |
|
|
(466,293 |
) |
|
|
- |
|
|
|
(747,412 |
) |
| Balances at December 31, 2018 |
|
$ |
5,996 |
|
|
$ |
2,874 |
|
|
|
19,655 |
|
|
$ |
28,525 |
|
|