Balance Sheets (Parenthetical) - $ / shares	Jun. 26, 2021	Dec. 27, 2020
Statement of Financial Position [Abstract]
Common stock, authorized shares	20,000,000	20,000,000
Common stock, issued shares	14,300,771	13,746,242
Common stock, outstanding shares	14,300,548	13,313,790
Common stock, par value	$ .01	$ .01