Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Jun. 30, 2021

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial information

	First		Second			Third			Fourth
2021	Quarter		Quarter			Quarter			Quarter
Net sales	$	7,265,515	$	6,962,065		$	4,205,068		$	9,301,950
Gross profit (loss)		1,127,374		713,461			(187,154	)		1,705,926
Net income (loss)		189,824		(181,006	)		(1,070,114	)		879,753
Net income (loss) per share -
Basic		0.08		(0.08	)		(0.44	)		0.36
Diluted		0.08		(0.08	)		(0.44	)		0.36
2020
Net sales	$	5,923,819	$	7,286,674		$	6,191,300		$	12,124,438
Gross profit		1,136,348		1,480,148			910,933			2,031,186
Net income (loss)		81,776		228,964			(103,765	)		956,693
Net income (loss) per share -
Basic		0.03		0.10			(0.04	)		0.40
Diluted		0.03		0.10			(0.04	)		0.40