Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 26, 2020	13,746,242
Balance at Dec. 26, 2020	$ 137,462	$ 36,688,894	$ (29,472,369)	$ (996,323)	$ 6,357,664
Share-based compensation expense		27,422			$ 27,422
Employee options exercises (in shares)	613,800				613,800
Employee options exercises	$ 6,138	1,209,358	0	(1,205,186)	$ 10,310
Net income			30,903		30,903
Balance (in shares) at Mar. 27, 2021	14,360,042
Balance at Mar. 27, 2021	$ 143,600	37,925,674	(29,441,466)	(2,201,509)	6,426,299
Balance (in shares) at Dec. 25, 2021	14,350,786
Balance at Dec. 25, 2021	$ 143,508	39,281,810	(26,256,492)	(2,515)	13,166,311
Share-based compensation expense		124,471			124,471
Issuance of Common Stock	$ 0	(9,614)			$ (9,614)
Employee options exercises (in shares)	72,700				72,700
Employee options exercises	$ 727	150,308	0	(3,108)	$ 147,927
Net income			419,436		419,436
Balance (in shares) at Apr. 02, 2022	14,423,486
Balance at Apr. 02, 2022	$ 144,235	$ 39,546,975	$ (25,837,056)	$ (5,623)	$ 13,848,531