| Summary of the changes in fair value of the warrant liability |
| Balance
at January 1, 2015 |
|
$ |
5,597,011 |
|
| Issuance
of warrants |
|
|
1,008,000 |
|
| Warrants
to be issued |
|
|
55,200 |
|
| Change
in value of warrant liability |
|
|
3,194,189 |
|
| Balance
at December 31, 2015 |
|
$ |
9,854,400 |
|
| |
|
|
|
|
| Issuance
of warrants |
|
|
1,096,000 |
|
| Change
in value of warrant liability |
|
|
14,681,311 |
|
| Warrants
exercised |
|
|
(9,806,844 |
) |
| Warrants
surrendered |
|
|
(14,511,867 |
) |
| Balance
at December 31, 2016 |
|
$ |
1,313,000 |
|
|