Annual report pursuant to Section 13 and 15(d)

13. COMMON STOCK AND WARRANTS (Tables)

v3.3.1.900
13. COMMON STOCK AND WARRANTS (Tables)
12 Months Ended
Dec. 31, 2015
Stockholders' Equity Note [Abstract]  
Warrant activity
    Number of
Shares
    Price per
Share
    Weighted
Average
Exercise Price
 
Balance at December 31, 2012     5,039       $1.80 – $745.50     $ 17.10  
Warrants issued     3,548       $6.32 – $7.59     $ 6.98  
Warrants exercised     (285 )     $1.80 – $8.85     $ 7.27  
Warrants expired     (27 )   $ 745.50     $ 745.50  
Balance at December 31, 2013     8,275       $5.47 – $735.00     $ 10.04  
Warrants exercised     (6,615 )     $6.09 – $8.85     $ 7.17  
Warrants expired     (804 )   $ 5.47     $ 5.47  
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