Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 7,545,432	$ 7,265,515
Cost of sales	6,192,334	6,138,141
Gross profit	1,353,098	1,127,374
Selling, general and administrative expenses	994,822	914,626
Operating income	358,276	212,748
Other income
Interest income	1,596	15,217
Other	17,971	3,128
Total other income	19,567	18,345
Income before provision for income taxes	377,843	231,093
Provision for income taxes	71,782	41,269
Net income	306,061	189,824
Other comprehensive income, net of tax
Unrealized loss on investment securities		(1,674)
Total comprehensive income	$ 306,061	$ 188,150
Net income per share:
Basic	$ 0.13	$ 0.08
Diluted	$ 0.13	$ 0.08
Weighted average number of shares outstanding:
Basic	2,423,267	2,402,633
Diluted	2,423,267	2,402,633
Dividends per share:		$ 0.25