Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities:
Net income	$ 81,776	$ 61,671
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation	47,176	37,371
Depreciation	142,798	122,872
ESOP compensation expense	87,833	101,361
Deferred income tax (benefit) expense	(8,688)	45,763
Changes in assets and liabilities:
Decrease (increase) in trade receivable, net	4,346,797	(1,417,803)
Increase in income taxes receivable	(93,981)	(127,222)
Increase in inventories, net	(1,612,900)	(2,354,298)
Decrease in prepaid expenses and other current assets	230,260	1,014,850
(Decrease) increase in accounts payable	(83,979)	758,776
Increase in accrued salaries and wages	102,634	58,419
(Decrease) increase in vacation accrual	(111,016)	3,385
Decrease in ESOP payable	(3,542)
(Decrease) increase in other accrued expenses	(25,245)	54,054
(Decrease) increase in payroll and other taxes withheld	(651)	15,131
Increase in contract liabilities	660,780
Decrease in income taxes payable	(30,481)
Net cash provided by (used in) operating activities	3,729,571	(1,625,670)
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(94,070)	(611,995)
Purchase of investment securities	(2,468,751)	(2,577,706)
Proceeds from sale/maturity of investment securities	2,581,496	6,654,073
Net cash provided by investing activities	18,675	3,464,372
Cash Flows from Financing Activities:
Dividends on common stock	(597,260)
Purchase of treasury stock	(8,291)
Proceeds from exercise of stock options	50,280	200,123
Net cash (used in) provided by financing activities	(555,271)	200,123
Increase in cash and cash equivalents	3,192,975	2,038,825
Cash and cash equivalents, beginning of period	1,462,761	4,298,796
Cash and cash equivalents, end of period	4,655,736	6,337,621
Supplemental Schedule of Cash Flow Information:
Income taxes paid	151,000	80,000
Supplemental Schedule of Non-cash Financing Activities
Accrual of dividends		$ 2,995,403

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