Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Computation of Basic and Diluted Loss per Share under Two-Class Method

The following table sets forth the computation of basic and diluted loss per share under the two-class method:

	Three months ended						Six months ended
	June 30,						June 30,
	2017			2016			2017			2016
Numerator for basic and diluted loss per share:
Net loss	$	(24,822	)	$	(20,296	)	$	(57,266	)	$	(44,980	)
Effect of reallocating undistributed earnings    of participating securities		—			—			—			—
Net loss available under the two-class method	$	(24,822	)	$	(20,296	)	$	(57,266	)	$	(44,980	)
Denominator:
Denominator for basic loss per share--weighted-average    shares		26,665,092			23,108,889			26,636,394			23,085,725
Effect of dilutive potential common shares		—			—			—			—
Denominator for diluted loss per share--adjusted    weighted-average shares		26,665,092			23,108,889			26,636,394			23,085,725
Basic loss per share	$	(0.93	)	$	(0.88	)	$	(2.15	)	$	(1.95	)
Diluted loss per share	$	(0.93	)	$	(0.88	)	$	(2.15	)	$	(1.95	)