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Selected quarterly financial data (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data

Summarized quarterly financial data for the years ended December 31, 2019 and 2018, are set forth in the following tables:

 

 

 

March 31

 

 

June 30

 

 

September 30

 

 

December 31

 

 

 

(In thousands, except per share data)

 

2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net revenues

 

$

17,448

 

 

$

15,002

 

 

$

14,595

 

 

$

15,993

 

Net loss

 

$

(14,883

)

 

$

(12,387

)

 

$

(10,370

)

 

$

(14,263

)

Net loss per share — basic and diluted

 

$

(0.08

)

 

$

(0.07

)

 

$

(0.05

)

 

$

(0.07

)

Weighted average common shares used to compute

   net loss per share — basic and diluted

 

 

187,434

 

 

 

188,054

 

 

 

199,906

 

 

 

206,689

 

2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net revenues

 

$

3,465

 

 

$

3,893

 

 

$

4,469

 

 

$

16,031

 

Net loss

 

$

(30,385

)

 

$

(22,675

)

 

$

(24,168

)

 

$

(9,747

)

Net loss per share — basic and diluted

 

$

(0.25

)

 

$

(0.16

)

 

$

(0.16

)

 

$

(0.06

)

Weighted average common shares used to compute

   net loss per share — basic and diluted

 

 

120,911

 

 

 

140,054

 

 

 

153,597

 

 

 

161,397