| Summary of changes in stockholders' equity |
|
|
|
January 31,
|
|
January 31,
|
|
|
|
|
2015
|
|
2014
|
|
|
Stockholders’ equity at beginning of period
|
|
$
|
38,068,058
|
|
$
|
4,739,124
|
|
|
|
|
|
|
|
|
|
Net loss
|
|
(8,679,353
|
)
|
(4,651,915
|
)
|
|
|
|
|
|
|
|
|
Stock-based compensation
|
|
1,016,771
|
|
292,398
|
|
|
|
|
|
|
|
|
|
Common stock issued for services
|
|
30,000
|
|
150,000
|
|
|
|
|
|
|
|
|
|
Exercise of common stock warrants
|
|
775,257
|
|
7,145,636
|
|
|
|
|
|
|
|
|
|
Exercise of stock options
|
|
1,738
|
|
108,000
|
|
|
|
|
|
|
|
|
|
Public offering on September 18, 2013, net of issuance costs of $836,360
|
|
—
|
|
11,111,640
|
|
|
|
|
|
|
|
|
|
Stockholders’ equity at end of period
|
|
$
|
31,212,471
|
|
$
|
18,894,883
|
|
|