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Statements of Operations and Other Comprehensive Income (Unaudited) - USD ($)
 3 Months Ended
Mar. 29, 2025
Mar. 30, 2024
Product sales $ 7,505,921 $ 5,912,634
Cost of product sales 6,274,920 5,006,324
Gross profit 1,231,001 906,310
Selling, general, and administrative expenses 1,101,350 1,165,922
Operating income (loss) 129,651 (259,612)
Other income, net 50,476 79,171
Income (loss) before income taxes 180,127 (180,441)
Income tax provision (benefit) 84,165 (37,288)
Net income (loss) 95,962 (143,153)
Other comprehensive income    
Net unrealized gains on available for sale securities 2,037 0
Reclassification adjustment for gains included in net income (16,237)  
Total other comprehensive income (14,200) 0
Comprehensive income (loss) $ 81,762 $ (143,153)
Net income (loss) per basic common share (in dollars per share) $ 0.01 $ (0.01)
Weighted average number of basic common shares outstanding (in shares) 14,525,960 14,519,215
Net income (loss) per diluted common share (in dollars per share) $ 0.01 $ (0.01)
Weighted average number of diluted common shares outstanding (in shares) 14,543,911 14,519,215