Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows from Operating Activities:
Net income	$ 1,094,544	$ 768,266
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	55,653	61,259
Depreciation	119,392	120,950
ESOP compensation expense	89,189	78,927
Deferred income tax benefit	(213,813)	(1,697)
Changes in assets and liabilities:
Increase in trade accounts receivable	(172,224)	(888)
Decrease in income taxes receivable	35,666
Decrease (increase) in inventories	634,314	(77,755)
Decrease (increase) in prepaid expenses and other current assets	245,730	(233,166)
Increase in accounts payable	700,799	831,816
Increase in accrued salaries and wages	199,658	65,431
Decrease in vacation accrual	(111,453)	(29,527)
(Decrease) increase in other accrued expenses	(23,443)	57,022
(Decrease) increase in payroll and other taxes withheld	(5,827)	4,493
Decrease in contract liabilities	(500,748)	(740,236)
Increase in income taxes payable	467,346	68,317
Net cash provided by operating activities	2,614,783	973,212
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(2,228,802)	(50,482)
Proceeds from grant award	968,722
Purchase of investment securities	(4,758,705)	(2,826,789)
Proceeds from sale/maturity of investment securities	3,660,437	1,120,000
Net cash used in investing activities	(2,358,348)	(1,757,271)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	59,480
Net cash provided by financing activities	59,480
Increase (decrease) in cash and short term investments	315,915	(784,059)
Cash and cash equivalents, beginning of period	2,748,755	8,104,060
Cash and cash equivalents, end of period	3,064,670	7,320,001
Supplemental Schedule of Cash Flow Information:
Income taxes paid		150,000
Supplemental Schedule of Non-cash Financing Activities:
Accrual of Dividends	$ 405,995