Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows from Operating Activities:
Net income	$ 5,815,140	$ 3,677,131
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	283,673	227,132
Depreciation	453,517	484,920
ESOP compensation expense	438,136	365,646
Deferred income tax benefit	(1,032,981)	(40,002)
Loss (gain) on disposal of property, plant and equipment	590	(2,500)
Changes in assets and liabilities:
Increase in trade accounts receivable	(880,208)	(22,108)
Decrease (increase) in income tax receivable	35,666	(35,666)
Decrease (increase) in inventories	645,572	(1,329,132)
Decrease (increase) in prepaid expenses and other current assets	1,051,075	(3,289,703)
Increase (decrease) in accounts payable	2,538,833	(866,802)
Increase in accrued salaries and wages	37,415	263,561
(Decrease) increase in vacation accrual	(174,044)	18,808
Increase (decrease) in other accrued expenses	209,805	(204,807)
Decrease (increase) in payroll and other taxes withheld	(9,180)	10,750
Increase in contract liabilities	961,584	4,697,364
Increase (decrease) in income taxes payable	220,607	(54,722)
Net cash provided by operating activities	10,595,200	3,899,870
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(5,164,165)	(512,016)
Proceeds from grant award	4,228,722
Proceeds from sale of property, plant and equipment	150	2,500
Purchase of investment securities	(26,423,984)	(15,902,014)
Proceeds from sale/maturity of investment securities	19,519,000	7,645,623
Net cash used in investing activities	(7,840,277)	(8,765,907)
Cash Flows from Financing Activities:
Dividends paid on common stock	(1,678,070)	(489,268)
Proceeds from exercise of stock options	526,362
Net cash used in financing activities	(1,151,708)	(489,268)
Increase (decrease) in cash and cash equivalents	1,603,215	(5,355,305)
Cash and cash equivalents, beginning of the year	2,748,755	8,104,060
Cash and cash equivalents, end of the year	4,351,970	2,748,755
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 2,258,965	$ 1,159,595