Quarterly Financial Information (Unaudited) (Schedule of Quarterly Financial Information) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2022	Jun. 30, 2021
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 8,481,243	$ 8,620,049	$ 7,458,050	$ 7,545,432	$ 9,301,950	$ 4,205,068	$ 6,962,065	$ 7,265,515	$ 32,104,774	$ 27,734,598
Gross profit (loss)	1,177,363	1,734,880	1,206,817	1,353,098	1,705,926	(187,154)	713,461	1,127,374	5,472,158	3,359,607
Net income (loss)	$ 276,506	$ 661,359	$ 21,201	$ 306,061	$ 879,753	$ (1,070,114)	$ (181,006)	$ 189,824	$ 1,265,127	$ (181,543)
Net income (loss) per share -
Basic	$ 0.11	$ 0.27	$ 0.01	$ 0.13	$ 0.36	$ (0.44)	$ (0.08)	$ 0.08	$ 0.52	$ (0.08)
Diluted	$ 0.11	$ 0.27	$ 0.01	$ 0.13	$ 0.36	$ (0.44)	$ (0.08)	$ 0.08	$ 0.52	$ (0.08)