Selected Quarterly Financial Data (unaudited)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (unaudited)
Selected Quarterly Financial Data (unaudited)

The following tables set forth selected unaudited quarterly consolidated statements of operations data for each of the eight quarters in years 2015 and 2014 (in thousands, except per share data):
 
 
Quarter Ended
 
 
Mar 31,
2014
 
Jun 30,
2014
 
Sept 30,
2014
 
Dec 31,
2014
 
Mar 31,
2015
 
Jun 30,
2015
 
Sept 30,
2015
 
Dec 31,
2015
Total revenue
 
8,376

 
10,533

 
12,209

 
14,487

 
15,951

 
18,510

 
19,539

 
21,315

Gross profit
 
1,793

 
3,116

 
5,054

 
7,870

 
8,779

 
10,256

 
10,852

 
11,660

Net loss
 
$
(24,281
)
 
$
(21,776
)
 
$
(20,199
)
 
$
(19,684
)
 
$
(19,643
)
 
$
(21,212
)
 
$
(20,007
)
 
$
(19,058
)
Net loss per share, basic and diluted
 
$
(0.90
)
 
$
(0.24
)
 
$
(0.23
)
 
$
(0.22
)
 
$
(0.21
)
 
$
(0.23
)
 
$
(0.21
)
 
$
(0.20
)