Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 61,671	$ 442,764
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation	37,371	21,423
Depreciation	122,872	105,674
ESOP compensation expense	101,361	89,460
Deferred income tax expense (benefit)	45,763	(2,795)
Changes in assets and liabilities:
Increase in trade receivable, net	(1,417,803)	(244,628)
(Increase) decrease in income taxes receivable	(127,222)	163,761
Increase in inventories, net	(2,354,298)	(726,219)
Decrease (increase) in prepaid expenses and other current assets	1,014,850	(48,774)
Increase in accounts payable	758,776	76,326
Increase in accrued salaries and wages	58,419	87,154
Increase (decrease) in vacation accrual	3,385	(35,854)
Decrease in ESOP payable		(11,250)
Increase (decrease) in other accrued expenses	54,054	(117,909)
Increase in payroll and other taxes withheld	15,131	2,656
Net cash used in operating activities	(1,625,670)	(198,211)
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(611,995)	(28,758)
Purchase of investment securities	(2,577,706)	(2,583,383)
Proceeds from sale/maturity of investment securities	6,654,073	723,118
Net cash provided by (used in) investing activities	3,464,372	(1,889,023)
Cash Flows from Financing Activities:
Dividends on common stock		(581,580)
Proceeds from exercise of stock options	200,123
Net cash provided by (used in) financing activities	200,123	(581,580)
Increase (decrease) in cash and cash equivalents	2,038,825	(2,668,814)
Cash and cash equivalents, beginning of period	4,298,796	10,058,163
Cash and cash equivalents, end of period	6,337,621	7,389,349
Supplemental Schedule of Cash Flow Information:
Income taxes paid	80,000	920,000
Supplemental Schedule of Non-cash Financing Activities:
Accrual of dividends	$ 2,995,404