Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2015	Dec. 28, 2014
Statement Of Financial Position [Abstract]
Class A common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Class A common stock, shares authorized	100,000,000	100,000,000
Class A common stock, shares issued	6,521,035	6,362,464
Class A common stock, shares outstanding	6,521,035	6,362,464