Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Tables)

v3.19.1
STOCKHOLDERS' EQUITY (Tables)
3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
The following table summarizes information with regard to outstanding warrants to purchase common stock as of March 31, 2019.
 
Offering
 
Number of Shares

Issuable Upon

Exercise of

Outstanding

Warrants
 
 
Exercise

Price
 
 
Expiration Date
 
July 2018 Series E Warrants
 
 
4,140,000
 
 
$
4.00
 
 
 
July 31, 2023
 
October 2017 Series D Warrants
 
 
310,856
 
 
$
17.80
 
 
 
October 14, 2024
 
November 2016 Public Offering Series C
 
 
415,785
 
 
$
15.00
 
 
 
November 29, 2021
 
April 2016 Underwritten Registered Series A
 
 
362,694
 
 
$
30.40
 
 
 
April 20,2021
 
October 2015 Incremental Series A
 
 
30,006
 
 
$
21.30
 
 
 
October 20,202
1
 
October 2015 Private Placement Series A
 
 
8,636
 
 
$
21.30
 
 
 
April 1, 2021
 
October 2015 Offering – Placement Agent
 
 
375
 
 
$
283.00
 
 
 
October 1, 2020
 
August 2014 Public Offering
(1)
 
 
50,395
 
 
$
468.00
 
 
 
August 20, 2019
 
Total
 
 
5,318,747
 
 
 
 
 
 
 
 
 
 
 
(1)
These warrants have a certain type of cash settlement feature and they have been accounted for as derivative instruments as described in Note 1, with the exception of
970
warrants issued in August 2014.