2. Net Income per Common Share

Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the period. With regard to common stock subject to vesting requirements and restricted stock units issued to the Company’s employees and non-employee members of its Board of Directors, the calculation includes only the vested portion of such stock and units.

Diluted net income per common share is computed by dividing net income by the weighted average number of common shares outstanding, increased by the assumed conversion of other potentially dilutive securities during the period.

The following table reconciles basic and dilutive weighted average common shares:

	Quarter Ended				Six Months Ended
	June 29,		June 30,		June 29,		June 30,
	2018		2017		2018		2017
Basic weighted average common shares outstanding		29,429,925		29,041,291		29,259,641		28,954,621

Effect of dilutive securities:
Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees		469,702		1,105,875		420,020		1,046,173
Common stock issuable upon the exercise of stock options and SARs		2,335,458		2,365,435		2,345,288		2,401,714
Dilutive weighted average common shares outstanding		32,235,085		32,512,601		32,024,949		32,402,508

Approximately 0.8 million shares of common stock equivalents were excluded from the computations of diluted net income per common share for both the quarter and six months ended June 29, 2018, as compared to 0.8 million and 0.7 million for the quarter and six months ended June 29, 2017, respectively, as their inclusion would have had an anti-dilutive effect on diluted net income per common share.