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Quarterly Concolidated Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2017
Quarterly Consolidated Financial Data (Unaudited)  
Summary of quarterly consolidated financial data (unaudited)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quarter Ended

 

 

    

 

March 31, 

    

 

June 30, 

    

 

September 30,

    

 

December 31,

 

Year ended December 31, 2017:

    

 

    

    

 

    

    

 

    

    

 

    

 

Operating revenues

 

$
41,927

 

$
30,469

 

$
45,627

 

$
39,125

 

Loss from operations

 

$
(12,141)

 

$
(15,385)

 

$
(4,136)

 

$
(5,778)

 

Net loss

 

$
(9,154)

 

$
(14,809)

 

$
(2,759)

 

$
(4,544)

 

Basic loss per share  attributable to common stock

 

$

(0.42)

 

$

(0.68)

 

$

(0.13)

 

$

(0.21)

 

Diluted loss per share attributable to common stock

 

$

(0.42)

 

$

(0.68)

 

$

(0.13)

 

$

(0.21)

 

Year ended December 31, 2016:

 

 

 

 

 

 

 

 

 

 

 

 

 

Operating revenues

 

$
47,055

 

$
28,086

 

$
28,122

 

$
30,067

 

Loss from operations

 

$
(10,631)

 

$
(13,266)

 

$
(14,257)

 

$
(11,282)

 

Net loss

 

$
(8,600)

 

$
(11,589)

 

$
(12,416)

 

$
(7,187)

 

Basic loss per share  attributable to common stock

 

$

(0.40)

 

$

(0.54)

 

$

(0.57)

 

$

(0.33)

 

Diluted loss per share attributable to common stock

 

$

(0.40)

 

$

(0.54)

 

$

(0.57)

 

$

(0.33)