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Equity (Tables)
3 Months Ended
Mar. 31, 2019
Stockholders Equity Note [Abstract]  
Schedule of Common Stock Purchase Warrant Activity

Common Stock purchase warrant activity for the period and year ended March 31, 2019 and December 31, 2018, respectively, are as follows:

 

 

 

Number of

Warrants

 

 

Weighted Avg.

Exercise Price

 

Outstanding at January 1, 2018

 

 

748,060

 

 

$

5.17

 

Issued

 

 

3,166,491

 

 

 

4.47

 

Cancelled or expired

 

 

(15,385

)

 

 

 

Exercised

 

 

(34,615

)

 

 

 

Outstanding at December 31, 2018

 

 

3,864,551

 

 

$

4.60

 

Issued

 

 

 

 

 

 

Cancelled or expired

 

 

 

 

 

 

Exercised

 

 

 

 

 

 

Outstanding at March 31, 2019

 

 

3,864,551

 

 

$

4.60

 

Schedule of Stock Option Activity Stock option activity for the three months and year ended March 31, 2019 and December 31, 2018, respectively, is as follows:

 

 

 

Number of

Shares

 

 

Weighted Avg.

Exercise Price

 

Outstanding at January 1, 2018

 

 

2,628,749

 

 

$

1.31

 

Options granted

 

 

2,034,525

 

 

 

6.21

 

Options exercised

 

 

 

 

 

 

Options expired

 

 

(127,593

)

 

 

 

Outstanding at December 31, 2018

 

 

4,535,681

 

 

$

3.31

 

Options granted

 

 

1,461,715

 

 

 

1.60

 

Options exercised

 

 

 

 

 

 

Options expired or cancelled

 

 

(91,813

)

 

 

 

Outstanding at March 31, 2019

 

 

5,905,583

 

 

$

2.94