Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Net Income (Loss) Per Share

For purposes of this calculation, common stock subject to repurchase by the Company and options are considered to be common stock equivalents and are only included in the calculation of diluted earnings per share when their effect is dilutive.

	Year Ended December 31,
	2014			2013			2012
	(in thousands, except per share amounts)
Numerator:
Net loss available to common stockholders	($	11,799	)	($	27,953	)	($	25,463	)
Denominator:
Weighted average shares outstanding - basic		40,649			36,982			35,849
Potential common shares - options (treasury stock method)		—			—			—
Weighted average shares outstanding - diluted		40,649			36,982			35,849
Shares excluded (anti-dilutive)		150			2			174
Shares excluded due to an exercise price greater than weighted average stock price for the period		1,511			2,150			1,453
Net loss per common share:
Basic	($	0.29	)	($	0.76	)	($	0.71	)
Diluted	($	0.29	)	($	0.76	)	($	0.71	)