Basic and Diluted Net IncomePer Share (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Earnings Per Share, Basic and Diluted

A reconciliation of the numerator and the denominator used to calculate basic and diluted loss per share is as follows (in thousands, except per share amounts):



	For the Years Ended December 31,
	2017			2016			2015
Numerator
Net loss	$	(52,604	)	$	(10,251	)	$	(14,678	)
Denominator—Basic
Weighted average shares used to calculate net loss per share, basic	38,994			37,668			36,789
Denominator—Diluted
Weighted average shares used to calculate net loss per share, basic	38,994			37,668			36,789
Effect of dilutive restricted stock ^(A)	—			—			—
Effect of dilutive stock options^(A)	—			—			—
Weighted average shares used to calculate net loss per share, diluted	38,994			37,668			36,789
Net loss per share:
Basic	$	(1.35	)	$	(0.27	)	$	(0.40	)
Diluted	$	(1.35	)	$	(0.27	)	$	(0.40	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following shares, by equity award type, were excluded from the calculation, as their effect would have been anti-dilutive (in thousands):



	For the Years Ended December 31,
	2017	2016	2015
Stock options	3,163	3,897	2,966
Restricted stock units	428	100	151
Performance based restricted stock units ^(B)	621	837	1,625
Total equity award shares excluded	4,212	4,834	4,742

(B) Performance based restricted stock units are presented based on attainment of 100% of the performance goals being met.