CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 26, 2015	Dec. 27, 2014
Accounts receivable, allowance	$ 153,000	$ 266,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	3,000	3,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	120,000,000	120,000,000
Common stock, issued	78,271,659	77,731,604
Common stock, outstanding	63,977,385	63,077,715
Treasury stock, shares	12,102,258	12,102,258