| Schedule of outstanding warrants |
A summary of outstanding warrants as of June 30, 2019 and December 31, 2018 is presented below:
|
|
|
Six Months Ended
|
|
|
Year Ended
|
|
|
|
|
June 30, 2019
|
|
|
December 31, 2018
|
|
|
Warrants outstanding, beginning of period
|
|
|
3,436,431
|
|
|
|
5,265,432
|
|
|
Granted
|
|
|
—
|
|
|
|
1,542,000
|
|
|
Exercised
|
|
|
(51,000
|
)
|
|
|
(2,385,317
|
)
|
|
Cancelled, forfeited and expired
|
|
|
—
|
|
|
|
(985,684
|
)
|
|
Warrants outstanding, end of period
|
|
|
3,385,431
|
|
|
|
3,436,431
|
|
A summary of outstanding warrants by year issued and exercise price as of June 30, 2019 is presented below:
|
|
|
|
|
|
Outstanding
|
|
|
Exercisable
|
|
|
Year issued and Exercise Price
|
|
|
Number of
Warrants
Issued
|
|
|
Weighted
Average
Remaining
Contractual
Life (Years)
|
|
|
Weighted
Average
Exercise
Price
|
|
|
Total
|
|
|
Weighted
Average
Exercise
Price
|
|
|
At December 31, 2015
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$
|
4.90
|
|
|
|
110,417
|
|
|
|
0.68
|
|
|
$
|
4.90
|
|
|
|
110,417
|
|
|
$
|
4.90
|
|
|
|
2015 Total
|
|
|
|
110,417
|
|
|
|
|
|
|
|
|
|
|
|
110,417
|
|
|
|
|
|
|
At December 31, 2016
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$
|
4.50
|
|
|
|
118,750
|
|
|
|
2.00
|
|
|
$
|
4.50
|
|
|
|
118,750
|
|
|
$
|
4.50
|
|
|
|
$
|
4.70
|
|
|
|
75,000
|
|
|
|
1.84
|
|
|
$
|
4.70
|
|
|
|
75,000
|
|
|
$
|
4.70
|
|
|
|
$
|
5.00
|
|
|
|
1,300,000
|
|
|
|
1.86
|
|
|
$
|
5.00
|
|
|
|
1,300,000
|
|
|
$
|
5.00
|
|
|
|
2016 Total
|
|
|
|
1,493,750
|
|
|
|
|
|
|
|
|
|
|
|
1,493,750
|
|
|
|
|
|
|
At December 31, 2017
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$
|
10.80
|
|
|
|
240,764
|
|
|
|
4.00
|
|
|
$
|
10.80
|
|
|
|
240,764
|
|
|
$
|
10.80
|
|
|
|
2017 Total
|
|
|
|
240,764
|
|
|
|
|
|
|
|
|
|
|
|
240,764
|
|
|
|
|
|
|
At December 31, 2018
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$
|
11.30
|
|
|
|
1,540,500
|
|
|
|
4.29
|
|
|
$
|
11.30
|
|
|
|
1,540,500
|
|
|
$
|
11.30
|
|
|
|
2018 Total
|
|
|
|
1,540,500
|
|
|
|
|
|
|
|
|
|
|
|
1,540,500
|
|
|
|
|
|
|
At June 30, 2019
|
Total
|
|
|
|
3,385,431
|
|
|
|
|
|
|
|
|
|
|
|
3,385,431
|
|
|
|
|
|
|
| Schedule of stock option activity |
Summaries of outstanding stock options as of June 30, 2019 and December 31, 2018 are presented below.
|
|
|
June 30, 2019
|
|
|
December 31, 2018
|
|
|
|
|
Number of
Options
|
|
|
Weighted‑
Average
Exercise
Price
|
|
|
Number of
Options
|
|
|
Weighted‑
Average
Exercise
Price
|
|
|
Options outstanding, beginning of period
|
|
|
6,642,200
|
|
|
$
|
4.40
|
|
|
|
6,775,200
|
|
|
$
|
4.12
|
|
|
Granted or deemed issued
|
|
|
50,000
|
|
|
$
|
10.30
|
|
|
|
357,000
|
|
|
$
|
11.28
|
|
|
Exercised
|
|
|
(200
|
)
|
|
$
|
5.00
|
|
|
|
(170,000
|
)
|
|
$
|
4.59
|
|
|
Cancelled, forfeited and expired
|
|
|
(33,333
|
)
|
|
$
|
11.30
|
|
|
|
(320,000
|
)
|
|
$
|
6.06
|
|
|
Options outstanding, end of period
|
|
|
6,658,667
|
|
|
$
|
4.41
|
|
|
|
6,642,200
|
|
|
$
|
4.40
|
|
|
Options exercisable, end of period
|
|
|
6,318,334
|
|
|
$
|
4.05
|
|
|
|
5,958,783
|
|
|
$
|
3.87
|
|
|
Options available for future grant
|
|
|
2,341,333
|
|
|
|
|
|
|
|
2,357,800
|
|
|
|
|
|
|