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Selected Quarterly Financial Data
 12 Months Ended
Dec. 31, 2013
Selected Quarterly Financial Data [Abstract]  
Selected Quarterly Financial Data
Selected Quarterly Financial Data
 
The table below sets forth certain unaudited statements of comprehensive loss data, and net loss per common share data, for each quarter of 2013 and 2012:
 
(in thousands, except per share data)
 
Quarter Ended
 
March 31
 
June 30
 
September 30
 
December 31
 
 
 
(Unaudited)
 
 
2013
 

 
 

 
 

 
 

Revenues
$
360

 
$
214

 
$
238

 
$
1,410

Loss from operations
$
(25,555
)
 
$
(28,624
)
 
$
(31,216
)
 
$
(16,976
)
Consolidated net loss
$
(25,974
)
 
$
(29,080
)
 
$
(31,658
)
 
$
(17,414
)
Consolidated net loss per common share, basic and diluted
$
(0.05
)
 
$
(0.06
)
 
$
(0.06
)
 
$
(0.03
)
Shares used in computing consolidated net loss per common share
512,428

 
513,083

 
513,419

 
513,523

2012
 
 
 
 
 
 
 
Revenues
$
300

 
$
199

 
$
372

 
$
218

Loss from operations
$
(29,383
)
 
$
(25,480
)
 
$
(29,060
)
 
$
(24,492
)
Consolidated net loss
$
(29,868
)
 
$
(25,931
)
 
$
(29,539
)
 
$
(24,873
)
Consolidated net loss per common share, basic and diluted
$
(0.06
)
 
$
(0.05
)
 
$
(0.06
)
 
$
(0.05
)
Shares used in computing consolidated net loss per common share
480,324

 
480,634

 
490,049

 
507,619