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Loss per Share (Tables)
9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Accordingly, basic and diluted loss per share is the same.
 
Basic and diluted net loss per share is calculated as follows (in thousands, except per share amounts):
 
 
 
Three month period
 
Nine month period
 
 
 
ended September 30,
 
ended September 30,
 
 
 
2015
 
2014
 
2015
 
2014
 
Basic and diluted numerator:
 
 
 
 
 
 
 
 
 
 
 
 
 
Net loss attributable to common stockholders
 
$
(9,530)
 
$
(12,151)
 
$
(16,076)
 
$
(17,390)
 
Basic and diluted denominator:
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average shares of common stock outstanding during the period
 
 
27,418,854
 
 
16,708,396
 
 
25,490,630
 
 
10,390,076
 
Basic and diluted net loss per common stock share
 
$
(0.35)
 
$
(0.73)
 
$
(0.63)
 
$
(1.67)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Such excluded shares are summarized as follows:
 
 
 
 
 
 
 
 
 
 
 
 
 
Common stock options
 
 
3,733,503
 
 
5,706,854
 
 
3,733,503
 
 
5,706,854
 
Restricted stock units (unvested)
 
 
-
 
 
1,226,063
 
 
-
 
 
1,226,063
 
Common shares issuable upon conversion of Series C Preferred Stock
 
 
27,404
 
 
1,433,100
 
 
27,404
 
 
1,433,100
 
Warrants
 
 
10,782,405
 
 
7,908,065
 
 
10,782,445
 
 
7,908,065
 
Common shares issuable upon conversion of Series D Preferred Stock (not including dividends or conversion premium paid in common stock)
 
 
4,652,632
 
 
-
 
 
4,652,632
 
 
-
 
Total shares excluded from calculation
 
 
19,195,944
 
 
16,157,877
 
 
19,195,944
 
 
16,157,877