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Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2012
Quarterly Financial Information (Unaudited) [Abstract]  
Quarterly Financial Information
Quarterly Financial Information (Unaudited)
 
 
First
 
Second
 
Third
 
Fourth
 
 
 
(In thousands, except per share data)
 
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2012
 
 
 
 
 
 
 
 
 
Grant revenue
 
$
471

 
$
590

 
$
327

 
$
299

 
Loss from operations
 
(4,817
)
 
(6,301
)
 
(5,848
)
 
(6,293
)
 
Net loss
 
(4,842
)
 
(6,309
)
 
(5,851
)
 
(6,319
)
 
Net loss per share
 
$
(0.23
)
 
$
(0.31
)
 
$
(0.28
)
 
$
(0.30
)
 
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2011
 
 
 
 
 
 
 
 
 
Grant revenue
 
$
604

 
$
537

 
$
430

 
$
301

 
Loss from operations
 
(3,892
)
 
(4,394
)
 
(3,972
)
 
(5,804
)
 
Net loss
 
(3,898
)
 
(4,394
)
 
(3,986
)
 
(5,810
)
 
Net loss per share
 
$
(1.07
)
 
$
(1.20
)
 
$
(1.09
)
 
$
(0.44
)