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Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Selected quarterly financial data

Set forth below is selected quarterly financial data for each of the quarters in the years ended December 31, 2015 and 2014.

 

 

 

2015 Quarters Ended

 

(in thousands except per share amounts)

 

March 31

 

 

June 30

 

 

September 30

 

 

December 31

 

Operating loss

 

$

(3,708

)

 

 

(3,623

)

 

 

(3,650

)

 

 

(4,229

)

Change in fair value of warrant liability, net

 

 

209

 

 

 

(48

)

 

 

1,253

 

 

 

(850

)

Net loss

 

 

(3,488

)

 

 

(3,699

)

 

 

(2,422

)

 

 

(5,095

)

Basic and diluted loss per share

 

 

(0.32

)

 

 

(0.30

)

 

 

(0.12

)

 

 

(0.23

)

 

 

 

2014 Quarters Ended

 

(in thousands except per share amounts)

 

March 31

 

 

June 30

 

 

September 30

 

 

December 31

 

Operating loss

 

$

(5,059

)

 

 

(5,904

)

 

 

(5,054

)

 

 

(3,285

)

Change in fair value of warrant liability, net

 

 

(205

)

 

 

1,297

 

 

 

519

 

 

 

330

 

Net loss

 

 

(5,278

)

 

 

(4,600

)

 

 

(4,558

)

 

 

(2,945

)

Basic loss per share

 

 

(0.57

)

 

 

(0.49

)

 

 

(0.48

)

 

 

(0.31

)

Diluted loss per share

 

 

(0.57

)

 

 

(0.52

)

 

 

(0.48

)

 

 

(0.31

)