Selected Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]  
Schedule of quarterly financial information
 
Quarter ended March 31, 2016
 
Quarter ended June 30, 2016
 
Quarter ended September 30, 2016
 
Quarter ended December 31, 2016
Consolidated Income Statement Data:
 
 
 
 
 
 
 
Revenues
$
40,235

 
$
42,618

 
$
41,208

 
$
42,745

Loss from operations
(4,206
)
 
(4,338
)
 
(7,117
)
 
(1,403
)
Net (loss) income
(21,066
)
 
(18,839
)
 
(21,235
)
 
(20,234
)
Basic loss per share
(1.41
)
 
(1.26
)
 
(1.42
)
 
(1.36
)
Diluted loss per share
(1.41
)
 
(1.26
)
 
(1.42
)
 
(1.36
)
 
Quarter ended March 31, 2015
 
Quarter ended June 30, 2015
 
Quarter ended September 30, 2015
 
Quarter ended December 31, 2015
Consolidated Income Statement Data:
 
 
 
 
 
 
 
Revenues
$
18,795

 
$
26,296

 
$
38,105

 
$
40,096

Loss from operations
(3,736
)
 
(11,339
)
 
(13,017
)
 
(1,347
)
Net (loss) income
(9,235
)
 
2,849

 
(23,279
)
 
(8,880
)
Basic income (loss) per share
(0.92
)
 
0.24

 
(1.56
)
 
(0.69
)
Diluted income (loss) per share
(0.92
)
 
0.24

 
(1.56
)
 
(0.69
)