Annual report pursuant to Section 13 and 15(d)

COMMON STOCK AND WARRANTS. (Tables)

v3.8.0.1
COMMON STOCK AND WARRANTS. (Tables)
12 Months Ended
Dec. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of warrant activity

The following table summarizes warrant activity for the years ended December 31, 2017, 2016 and 2015 (number of shares in thousands):

 

    Number of
Shares
    Price per
Share
    Weighted
Average
Exercise Price
 
Balance at December 31, 2014     856     $6.09 – $735.00     $ 36.55  
Warrants exercised     (42 )   $8.85     $ 8.85  
Warrants expired     (432 )   $8.85     $ 8.85  
Balance at December 31, 2015     382     $6.09 – $735.00     $ 70.87  
Warrants exercised     (138 )   $8.43     $ 8.43  
Balance at December 31, 2016     244     $6.09 – $735.00     $ 106.72  
Warrants exercised     (191 )   $6.09     $ 6.09  
Warrants expired     (49 )   $6.09 – $735.00     $ 444.00  
Balance at December 31, 2017     4     $735.00     $ 735.00