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Shareholders' Equity (Tables)
3 Months Ended
Mar. 31, 2013
Shareholders’ Equity [Abstract]  
Schedule of Stockholders' Equity Note, Stock Options and warrants [Table Text Block]
The following table summarizes the activity for stock options and warrants for the three months ended March 31, 2013:
 
Stock Options
 
Warrants
 
Shares
 
Weighted Average Exercise Price
 
Shares
 
Weighted Average Exercise Price
Outstanding at December 31, 2012
21,686,680

 
$1.29
 
55,287,611

 
$1.57
 
 
 
 
 
 
 
 
Changes during the Year:
 
 
 
 
 
 
 
Granted
4,860,331

 
0.62
 
50,545

 
0.83
Exercised

 
 
(207,610
)
 
0.51
Forfeited
(185,198
)
 
0.66
 

 
Expired
(50,000
)
 
1.28
 
(120,000
)
 
4.12
Outstanding at March 31, 2013
26,311,813

 
$1.17
 
55,010,546

 
$1.56
 
 
 
 
 
 
 
 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
During the three months ended March 31, 2013 and 2012, the Company issued warrants for services as follows ($ in thousands, except share data):
 
 
Three Months Ended March 31,
  
 
2013
 
2012
Number of Common Stock Purchase Warrants Issued
 
39,128

 
125,000

Value of Common Stock Purchase Warrants Issued
 
$
14.9

 
$
50.6

Restricted Stock [Table Text Block]

During the three months ended March 31, 2013 and 2012, the Company issued restricted stock for services as follows ($ in thousands, except share data):

 
 
Three Months Ended March 31,
  
 
2013
 
2012
Number of Restricted Stock Issued
 
1,774,917

 
189,814

Value of Restricted Stock Issued
 
$
1,127.9

 
$
91.2