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Statements of Comprehensive Income (Unaudited) - USD ($)
 3 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Income Statement [Abstract]    
Net sales $ 8,635,795 $ 7,545,432
Cost of sales 6,823,653 6,192,334
Gross profit 1,812,142 1,353,098
Selling, general and administrative expenses 839,030 994,822
Operating income 973,112 358,276
Other income    
Interest income 8,807 1,596
Other 3,767 17,971
Total other income 12,574 19,567
Income before provision for income taxes 985,686 377,843
Provision for income taxes 217,420 71,782
Net income 768,266 306,061
Other comprehensive income, net of tax    
Unrealized loss on investment securities (1,763)
Total comprehensive income $ 766,503 $ 306,061
Net income per share:    
Basic $ 0.31 $ 0.13
Diluted $ 0.31 $ 0.13
Weighted average number of shares outstanding:    
Basic 2,446,402 2,423,267
Diluted 2,447,519 2,423,267