Net (Loss) Income Per Common Share (Reconciliation of Basic and Diluted Weighted Average Shares) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	30,015,038	29,822,917	29,952,090	29,752,903
Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees		222,438	111,785	230,742
Common stock issuable upon the exercise of stock options and SARs		2,328,797	2,237,057	2,350,656
Dilutive weighted average common shares outstanding	30,015,038	32,374,152	32,300,932	32,334,301