CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 25, 2017	Dec. 31, 2016	Mar. 19, 2016
Receivables allowance (in dollars)	$ 1,154	$ 910	$ 1,888
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued	0	0	0
Common stock, shares authorized	30,000,000	30,000,000	30,000,000
Common stock, shares issued	14,345,528	14,304,959	14,254,972
Common stock, shares outstanding	14,345,528	14,304,959	14,254,972