QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jan. 01, 2023	Sep. 25, 2022	Jun. 26, 2022	Mar. 27, 2022	Dec. 26, 2021	Sep. 26, 2021	Jun. 27, 2021	Mar. 28, 2021	Jan. 01, 2023	Dec. 26, 2021	Dec. 27, 2020
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 77,282,512	$ 78,507,873	$ 74,089,166	$ 68,542,277	$ 67,694,450	$ 64,184,813	$ 57,397,722	$ 49,750,192	$ 298,421,828	$ 239,027,177	$ 207,125,480
Gross Profit	27,057,401	27,999,845	25,059,426	23,430,799	23,431,825	22,046,888	19,247,481	16,214,709	103,547,470	80,940,903	66,039,434
Income from continuing operations	1,417,311	4,652,473	3,183,642	2,007,769	4,320,752	3,713,480	2,635,226	(211,583)	11,261,195	10,457,875	(2,071,887)
Income (loss) from discontinued operations, net of tax	314,892	0	(7,228)	13,792,014	990,482	930,129	807,612	923,380	14,099,678	3,651,603
Net income	$ 1,732,203	$ 4,652,473	$ 3,176,414	$ 15,799,783	$ 5,311,234	$ 4,643,609	$ 3,442,838	$ 711,797	$ 25,360,873	$ 14,109,478	$ 1,441,468
Net income per share - basic:
Net Income from continuing operations (in dollars per share)	$ 0.14	$ 0.44	$ 0.30	$ 0.19	$ 0.42	$ 0.36	$ 0.25	$ (0.02)	$ 1.08	$ 1.01	$ (0.20)
Income from discontinued operations (in dollars per share)	0	0	0	0.12	0.09	0.09	0.08	0.09	0.12	0.35
Gain on sale (in dollars per share)	0.03	0	0	1.66					1.69
Income tax expense (in dollars per share)	(0.01)	0	0	(0.45)					(0.46)	(0.09)	(0.12)
Net income per share - basic (in dollars per share)	0.16	0.44	0.30	1.52	0.51	0.45	0.33	0.07	2.43	1.36	0.14
Net income per share - diluted:
Net Income from continuing operations (in dollars per share)	0.14	0.44	0.30	0.19	0.41	0.36	0.25	(0.02)	1.07	1.00
Net Income from discontinued operations: Income (in dollars per share)	0	0	0	0.12	0.09	0.09	0.08	0.09	0.12	0.35
Gain on sale (in dollars per share)	0.03	0	0	1.65					1.69
Income tax expense (in dollars per share)	(0.01)	0	0	(0.45)					(0.46)	(0.09)	(0.12)
Net income per share - diluted (in dollars per share)	$ 0.16	$ 0.44	$ 0.30	$ 1.51	$ 0.50	$ 0.45	$ 0.33	$ 0.07	$ 2.42	$ 1.35	$ 0.14
Weighted-average shares outstanding:
Basic (in shares)	10,500,733	10,492,396	10,472,353	10,428,897	10,414,262	10,380,902	10,340,243	10,332,817	10,426,821	10,367,054	10,311,606
Diluted (in shares)	10,544,323	10,532,918	10,514,261	10,485,104	10,464,885	10,427,114	10,391,925	10,394,841	10,472,845	10,416,610	10,338,029