Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 26, 2015
Statement of Financial Position [Abstract]
Common stock, authorized	20,000,000	20,000,000
Common stock, issued shares	13,413,492	13,412,292
Common stock, outstanding shares	13,203,436	13,197,918
Common stock, par value	$ .01	$ .01