UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)	Total	Preferred Stock	Common Stock	Treasury Stock Amount	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Stockholders’ equity, beginning balance at Dec. 29, 2019	$ 68,456,990	$ 0	$ 103,093	$ (27,318)	$ 59,617,787	$ 8,763,428	$ 0
Stockholders’ equity, beginning balance (in shares) at Dec. 29, 2019			10,309,236
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	192,913				192,913
Issuance of restricted shares (in shares)			2,250
Issuance of restricted shares	0		$ (23)		23
Cash dividend declared	(3,092,771)					(3,092,771)
Net income (loss)	1,498,860					1,498,860
Stockholders’ equity, ending balance at Mar. 29, 2020	67,055,992	0	$ 103,070	(27,318)	59,810,723	7,169,517	0
Stockholders’ equity, ending balance (in shares) at Mar. 29, 2020			10,306,986
Stockholders’ equity, beginning balance at Dec. 29, 2019	68,456,990	0	$ 103,093	(27,318)	59,617,787	8,763,428	0
Stockholders’ equity, beginning balance (in shares) at Dec. 29, 2019			10,309,236
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(764,840)
Stockholders’ equity, ending balance at Sep. 27, 2020	64,034,756	0	$ 103,170	(27,318)	60,238,267	3,875,119	(154,482)
Stockholders’ equity, ending balance (in shares) at Sep. 27, 2020			10,317,018
Stockholders’ equity, beginning balance at Mar. 29, 2020	67,055,992	0	$ 103,070	(27,318)	59,810,723	7,169,517	0
Stockholders’ equity, beginning balance (in shares) at Mar. 29, 2020			10,306,986
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	193,077				193,077
Share issuance cost					(10,000)
Exercise of common stock options and warrants (in shares)			0
Exercise of common stock options	10,000		$ 0
Cash dividend declared	(515,349)					(515,349)
Net income (loss)	(4,829,263)					(4,829,263)
Unrealized gains (losses) on cash flow hedges	(171,723)
Stockholders’ equity, ending balance at Jun. 28, 2020	61,722,734	0	$ 103,070	(27,318)	59,993,800	1,824,905	(171,723)
Stockholders’ equity, ending balance (in shares) at Jun. 28, 2020			10,306,986
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	244,567				244,567
Issuance of restricted shares (in shares)			(10,032)
Issuance of restricted shares			$ 100		(100)
Cash dividend declared	(515,349)					(515,349)
Net income (loss)	2,565,563					2,565,563
Unrealized gains (losses) on cash flow hedges	17,241
Stockholders’ equity, ending balance at Sep. 27, 2020	64,034,756	0	$ 103,170	(27,318)	60,238,267	3,875,119	(154,482)
Stockholders’ equity, ending balance (in shares) at Sep. 27, 2020			10,317,018
Stockholders’ equity, beginning balance at Dec. 27, 2020	65,457,752	0	$ 103,284	(29,450)	60,457,044	5,049,748	(122,874)
Stockholders’ equity, beginning balance (in shares) at Dec. 27, 2020			10,328,379
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	236,007				236,007
Share issuance cost	(10,000)				(10,000)
Issuance of restricted shares (in shares)			(7,518)
Issuance of restricted shares	0		$ 75		(75)
Exercise of common stock options and warrants (in shares)			213
Exercise of common stock options	0		$ 2		(2)
Cash dividend declared	(1,033,597)					(1,033,597)
Net income (loss)	711,797					711,797
Unrealized gains (losses) on cash flow hedges	(32,215)						32,215
Stockholders’ equity, ending balance at Mar. 28, 2021	65,394,174	0	$ 103,361	(29,450)	60,682,974	4,727,948	(90,659)
Stockholders’ equity, ending balance (in shares) at Mar. 28, 2021			10,336,110
Stockholders’ equity, beginning balance at Dec. 27, 2020	$ 65,457,752	0	$ 103,284	(29,450)	60,457,044	5,049,748	(122,874)
Stockholders’ equity, beginning balance (in shares) at Dec. 27, 2020			10,328,379
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of ESPP Shares (shares)	14,758
Net income (loss)	$ 8,798,244
Stockholders’ equity, ending balance at Sep. 26, 2021	72,030,726	0	$ 104,013	(37,892)	61,487,340	10,531,878	(54,613)
Stockholders’ equity, ending balance (in shares) at Sep. 26, 2021			10,401,312
Stockholders’ equity, beginning balance at Mar. 28, 2021	65,394,174	0	$ 103,361	(29,450)	60,682,974	4,727,948	(90,659)
Stockholders’ equity, beginning balance (in shares) at Mar. 28, 2021			10,336,110
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	225,380				225,380
Issuance of restricted shares (in shares)			(7,230)
Issuance of restricted shares	0		$ 72		(72)
Cash dividend declared	(1,034,334)					(1,034,334)
Net income (loss)	3,442,838					3,442,838
Unrealized gains (losses) on cash flow hedges	29,814
Stockholders’ equity, ending balance at Jun. 27, 2021	68,057,872	0	$ 103,433	(29,450)	60,908,282	7,136,452	(60,845)
Stockholders’ equity, ending balance (in shares) at Jun. 27, 2021			10,343,340
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	424,328				424,328
Share issuance cost (in shares)			0
Share issuance cost	3,500		$ 0		3,500
Issuance of restricted shares (in shares)			(42,814)
Issuance of restricted shares	$ (8,442)		$ 428	(8,442)	(428)
Issuance of ESPP Shares (shares)	14,758
Issuance of ESPP Shares	$ 154,922		$ 148		154,774
Exercise of common stock options and warrants (in shares)			400
Exercise of common stock options	3,888		$ 4		3,884
Cash dividend declared	(1,248,183)					(1,248,183)
Net income (loss)	4,643,609					4,643,609
Unrealized gains (losses) on cash flow hedges	6,232
Stockholders’ equity, ending balance at Sep. 26, 2021	$ 72,030,726	$ 0	$ 104,013	$ (37,892)	$ 61,487,340	$ 10,531,878	$ (54,613)
Stockholders’ equity, ending balance (in shares) at Sep. 26, 2021			10,401,312