Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Net income	$ 1,914,308	$ 327,262
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	103,177	94,567
Depreciation	242,357	253,846
ESOP compensation expense	155,477	168,318
Deferred income tax benefit	(7,889)	(33,908)
Gain on disposal of assets	(2,500)
Changes in assets and liabilities:
Decrease in trade accounts receivable	1,123,730	465,382
Increase in income taxes receivable		(3,041)
Increase in inventories	(210,057)	(537,319)
Increase in prepaid expenses and other current assets	(1,168,686)	(108,560)
Increase (decrease) in accounts payable	826,214	(132,999)
(Decrease) increase in accrued salaries and wages	(226,885)	173,422
Increase (decrease) in vacation accrual	20,585	(16,319)
Decrease in other accrued expenses	(217,945)	(68,977)
Increase (decrease) in payroll and other taxes withheld	2,123	(130,957)
Increase (decrease) in contract liabilities	1,901,599	(172,859)
Increase in income taxes payable	227,842
Net cash provided by operating activities	4,683,450	277,858
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(103,885)	(97,288)
Proceeds from sale of fixed assets	2,500
Purchase of investment securities	(8,515,017)	(2,061,000)
Proceeds from sale/maturity of investment securities	2,157,334	2,096,000
Net cash used in investing activities	(6,459,068)	(62,288)
(Decrease) increase in cash and cash equivalents	(1,775,618)	215,570
Cash and cash equivalents, beginning of period	8,104,060	6,802,712
Cash and cash equivalents, end of period	6,328,442	7,018,282
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 311,000	$ 120,000