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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]  
Selected Quarterly Financial Data (Unaudited)
Selected Quarterly Financial Data (Unaudited)

Selected summarized quarterly financial information for 2018 and 2017 is as follows (in thousands, except per share amounts):
 
For the Year Ended December 31, 2018
First 
Quarter
 
Second 
Quarter
 
Third 
Quarter
 
Fourth
 Quarter
 
Year
Revenue
$
43,070

 
$
32,657

 
$
40,751

 
$
134,917

 
$
251,395

Income (loss) from operations
(6,720
)
 
(16,920
)
 
(15,454
)
 
41,645

 
2,551

Net income (loss)
(4,845
)
 
(12,014
)
 
(8,972
)
 
26,072

 
241

Net income (loss) per share:
 
 
 
 
 
 
 
 
 
Basic (2)
$
(0.26
)
 
$
(0.63
)
 
$
(0.47
)
 
$
1.32

 
$
0.01

Diluted (2)
$
(0.26
)
 
$
(0.63
)
 
$
(0.47
)
 
$
1.25

 
$
0.01

 
 
 
 
 
 
 
 
 
 
For the Year Ended December 31, 2017
First 
Quarter (1)
 
Second 
Quarter (1)
 
Third 
Quarter (1)
 
Fourth
 Quarter (1)
 
Year (1)
Revenue
$
41,556

 
$
34,566

 
$
31,466

 
$
83,118

 
$
190,706

Income (loss) from operations
(4,113
)
 
(10,468
)
 
(15,673
)
 
20,802

 
(9,452
)
Net income (loss)
1,080

 
(1,506
)
 
(2,176
)
 
28,028

 
25,426

Net income (loss) per share:
 
 
 
 
 
 
 
 
 
Basic (2)
$
0.06

 
$
(0.08
)
 
$
(0.12
)
 
$
1.50

 
$
1.37

Diluted (2)
$
0.06

 
$
(0.08
)
 
$
(0.12
)
 
$
1.47

 
$
1.33

(1) As adjusted for the adoption of ASC 606 using the full retrospective method
(2) Computed using weighted-average share amounts outstanding for the respective periods presented