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Selected Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data
Year ended Year ended December 31, 2014
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 
Total
Revenues
$
33,268

 
$
37,620

 
$
29,611

 
$
41,417

 
$
141,916

Operating (loss) / income
$
(2,190
)
 
$
2,244

 
$
(14,850
)
 
$
6,964

 
$
(7,832
)
Net (loss) / income
$
(2,603
)
 
$
1,767

 
$
(11,065
)
 
$
6,843

 
$
(5,058
)
(Loss) / earnings per share—basic and diluted
$
(0.05
)
 
$
0.03

 
$
(0.19
)
 
$
0.12

 
$
(0.09
)
Weighted average common shares outstanding
 
 
 
 
 
 
 
 
 
Basic
56,680,826

 
56,964,079

 
57,074,872

 
57,090,226

 
56,953,958

Diluted
56,680,826

 
57,729,551

 
57,074,872

 
57,875,017

 
56,953,958

Year ended Year ended December 31, 2013
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 
Total
Revenues
$
37,224

 
$
42,198

 
$
33,848

 
$
47,405

 
$
160,675

Operating (loss) / income
$
(3,045
)
 
$
(636
)
 
$
(4,076
)
 
$
5,860

 
$
(1,897
)
Net (loss) / income
$
(3,273
)
 
$
(1,180
)
 
$
(4,295
)
 
$
6,976

 
$
(1,772
)
(Loss) / earnings per share—basic and diluted
$
(0.05
)
 
$
(0.02
)
 
$
(0.06
)
 
$
0.12

 
$
(0.03
)
Weighted average common shares outstanding
 
 
 
 
 
 
 
 
 
Basic
67,241,626

 
67,371,869

 
67,490,820

 
57,630,635

 
64,912,368

Diluted
67,241,626

 
67,371,869

 
67,490,820

 
58,011,641

 
64,912,368

Note: Basic and diluted earnings per share are computed independently for each quarter and full year presented. Accordingly, the sum of the quarterly earnings per share data may not agree with the calculated full year earnings per share.