Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities:
Net income	$ 279,430	$ 2,057,635
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Bad debt expense	69,010
Stock-based compensation	77,876	50,470
Depreciation	256,186	211,193
ESOP compensation expense	203,809	179,038
Deferred income tax expense	91,220	6,565
Changes in assets and liabilities:
Increase in trade receivable, net	(1,339,155)	(2,158,887)
Increase in income taxes receivable	(116,081)
(Increase) decrease in inventories, net	(4,326,042)	736,921
Decrease (increase) in prepaid expenses and other current assets	1,122,186	(25,471)
Increase (decrease) in accounts payable	784,204	(953,181)
(Decrease) increase in accrued salaries and wages	(35,294)	232,337
Increase (decrease) in vacation accrual	8,079	(26,291)
Decrease in ESOP payable	(43,749)	(22,500)
Increase (decrease) in other accrued expenses	48,208	(129,873)
Increase in payroll and other taxes withheld	1,372	3,757
Decrease in contract liabilities	(96,870)
Increase in income tax payable		435,131
Net cash (used in) provided by operating activities	(3,015,611)	596,844
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(354,933)	(185,190)
Purchase of investment securities	(3,103,004)	(4,696,925)
Proceeds from sale/maturity of investment securities	8,837,220	2,701,431
Net cash provided by (used in) investing activities	5,379,283	(2,180,684)
Cash Flows from Financing Activities:
Dividends on common stock	(3,550,735)	(1,162,382)
Purchase of treasury stock		(109,694)
Proceeds from exercise of stock options	200,123
Net cash used in financing activities	(3,350,612)	(1,272,076)
Decrease in cash and cash equivalents	(986,940)	(2,855,916)
Cash and cash equivalents, beginning of period	4,298,796	10,058,163
Cash and cash equivalents, end of period	3,311,856	7,202,247
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 80,000	$ 260,000