Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net income	$ 1,268,409	$ 493,594
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
(Recovery of) doubtful accounts of accounts receivable	(35,305)	(9,226)
Depreciation of equipment and leasehold improvements	293,465	302,616
Stock-based compensation expense	463,633	619,137
Change in cash surrender value of life insurance	(211,636)	(208,116)
(Benefit) provision for deferred compensation	(160,120)	308,000
Deferred compensation paid	(71,250)	(150,000)
Deferred compensation relieved	(472,883)
Other income - SBA loan forgiveness		(506,700)
Other income - Net gain from life insurance benefits	(262,391)
Loss on disposal of fixed assets	7,856
Net changes in operating assets and liabilities:
Accounts receivable	429,470	85,505
Inventories	(2,729,850)	(362,718)
Prepaid expenses and other current assets	267,526	(188,357)
Income taxes receivable		14,622
Income taxes payable	(1,510)	4,543
Accounts payable	397,730	(429,272)
Accrued liabilities	44,789	85,468
Deferred revenue	(170,463)	289,644
Net cash (used in) provided by operating activities	(942,530)	348,740
Investing activities:
Purchase of equipment and leasehold improvements	(108,158)	(600,155)
Life insurance premiums paid	(95,887)	(104,051)
Proceeds from life insurance policy	2,014,184
Net cash provided by (used in) investing activities	1,810,139	(704,206)
Financing activities:
Proceeds from exercise of stock options	1,390,346	3,306,272
Net cash provided by financing activities	1,390,346	3,306,272
Net increase in cash and cash equivalents	2,257,955	2,950,806
Cash and cash equivalents at beginning of year	6,950,215	3,999,409
Cash and cash equivalents at end of year	$ 9,208,170	$ 6,950,215