Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash Flows from Operating Activities:
Net income	$ 8,142,954	$ 5,815,140
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	346,281	283,673
Depreciation	451,523	453,517
ESOP compensation expense	622,472	438,136
Deferred income tax benefit	(306,865)	(1,032,981)
Loss (gain) on disposal of property, plant and equipment		590
Changes in assets and liabilities:
Increase in trade accounts receivable	(963,398)	(880,208)
Decrease in income tax receivable		35,666
Increase in inventories	1,401,960	645,572
Increase in prepaid expenses and other current assets	(1,702,160)	1,051,075
Decrease in accounts payable	(1,109,633)	2,538,833
Increase in accrued salaries and wages	257,224	37,415
Increase in vacation accrual	56,934	(174,044)
Decrease other accrued expenses	(163,399)	209,805
Increase in payroll and other taxes withheld	36,594	(9,180)
Increase in contract liabilities	13,842,982	961,584
Increase in income taxes payable	77,903	220,607
Net cash provided by operating activities	20,991,372	10,595,200
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(4,365,403)	(5,164,165)
Proceeds from grant award	3,260,000	4,228,722
Proceeds from sale of property, plant and equipment		150
Purchase of investment securities	(33,873,762)	(26,423,984)
Proceeds from sale/maturity of investment securities	28,040,200	19,519,000
Net cash used in investing activities	(6,938,965)	(7,840,277)
Cash Flows from Financing Activities:
Dividends paid on common stock	(2,597,354)	(1,678,070)
Proceeds from exercise of stock options	3,055,622	526,362
Net cash provided by (used in) financing activities	458,268	(1,151,708)
Increase in cash and cash equivalents	14,510,675	1,603,215
Cash and cash equivalents, beginning of the year	4,351,970	2,748,755
Cash and cash equivalents, end of the year	18,862,645	4,351,970
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 1,815,732	$ 2,258,965