Statements of Operations and Other Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Product sales	$ 8,078,657	$ 5,030,313	$ 15,584,578	$ 10,942,947
Cost of product sales	6,742,341	5,260,305	13,017,261	10,266,629
Gross profit	1,336,316	(229,992)	2,567,317	676,318
Selling, general, and administrative expenses	1,199,389	1,084,995	2,300,739	2,250,917
Income (loss) from operations	136,927	(1,314,987)	266,578	(1,574,599)
Other income, net	19,025	90,851	69,501	170,021
Net income (loss) before income taxes	155,952	(1,224,136)	336,079	(1,404,578)
Income tax provision (benefit)	52,119	(269,832)	136,284	(307,120)
Net income (loss)	103,833	(954,304)	199,795	(1,097,458)
Other comprehensive income
Net unrealized gains on available for sale securities	8,169	8,701	10,206	8,701
Reclassification adjustment for gains included in net income	0	0	(16,237)	0
Total other comprehensive income	8,169	8,701	(6,031)	8,701
Comprehensive income (loss)	$ 112,002	$ (945,603)	$ 193,764	$ (1,088,757)
Net income (loss) per basic common share (in dollars per share)	$ 0.01	$ (0.07)	$ 0.01	$ (0.08)
Weighted average number of basic common shares outstanding (in shares)	14,525,960	14,519,215	14,525,960	14,519,215
Net income (loss) per diluted common share (in dollars per share)	$ 0.01	$ (0.07)	$ 0.01	$ (0.08)
Weighted average number of diluted common shares outstanding (in shares)	14,577,433	14,519,215	14,560,672	14,519,215