Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Potential Common Shares Excluded From Computation Of Diluted Net Loss Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the components used in the computation of basic and diluted net income (loss) per share for the three years ended December 31, 2018:

(in thousands, except share and per share data)	Year Ended December 31, 2018		Year Ended December 31, 2017			Year Ended December 31, 2016
Numerator:
Net income (loss) from continuing operations (1)	$	3,292	$	(26,831	)	$	(27,210	)
Denominator:
Weighted average common shares outstanding	58,859,574		58,003,434			57,251,377
Effective of dilutive potential common share equivalents
Stock options	1,678,535		—			—
Restricted stock units	469,915		—			—
Shares used for diluted net income (loss) per share	61,008,024		58,003,434			57,251,377
Net income (loss) per share:
Basic	$	0.06	$	(0.46	)	$	(0.48	)
Diluted	$	0.05	$	(0.46	)	$	(0.48	)

Potential Common Shares Excluded from Computation of Diluted Net Loss per Share

The number of potential common share equivalents excluded from the computation of diluted net income (loss) per share for the years ended December 31, 2018, 2017 and 2016 are as follows:

	Years Ended December 31,
	2018	2017	2016
1.375% Convertible Senior Notes	4,319,429	4,319,429	—
2.00% Convertible Senior Notes	—	78,783	1,442,433
1.25% Convertible Senior Notes	5,910,954	5,910,954	5,910,954
Unvested restricted stock units	289,974	994,364	962,219
Outstanding stock options	236,648	3,377,220	3,441,303
Total potential common share equivalents excluded from computation of diluted net income (loss) per share	10,757,005	14,680,750	11,756,909