v3.8.0.1

Net (Loss) Income per Share Attributable to Common Stockholders - Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Numerator:
Net (loss) income attributable to common stockholders, basic	$ 1,741	$ 192
Net (loss) income attributable to common stockholders, diluted	1,741	192
Plus: undistributed earnings allocated to participating securities	956	632
Less: undistributed earnings reallocated to participating securities	(936)	(630)
Net income attributable to common stockholders	$ 1,761	$ 194
Denominator:
Weighted average number of shares outstanding, basic (shares)	30,551	29,149
Dilutive impact from:
Weighted average number of shares outstanding, diluted (shares)	33,344	31,282
Net (loss) income per share attributable to common stockholders (Basic):
Net income (loss) per share, basic (in dollars per share)	$ 0.06	$ 0.01
Net (loss) income per share attributable to common stockholders (Diluted):
Net income (loss) per share, diluted (in dollars per share)	$ 0.05	$ 0.01
Employee Stock Option
Dilutive impact from:
Share-based payment arrangements	2,044	1,705
Restricted stock units
Dilutive impact from:
Share-based payment arrangements	749	428

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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