CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) - shares	Jun. 27, 2015	Dec. 27, 2014	Jun. 28, 2014
SHAREHOLDERS' EQUITY:
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0	0
Preferred stock, shares outstanding (in shares)	0	0	0
Common stock, shares authorized (in shares)	40,000,000	40,000,000	40,000,000
Common stock, shares issued (in shares)	20,132,819	19,984,451	20,071,026
Common stock, shares outstanding (in shares)	20,132,819	19,984,451	20,071,026