Statements of Cash Flows - USD ($)	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities:
Net income	$ 2,465,425	$ 2,636,672
Adjustments to reconcile net income to net cash provided by operating activities:
Excess tax benefits from share-based compensation	(15,021)	(26,835)
Stock-based compensation	74,533	42,051
Depreciation	324,745	336,403
ESOP compensation expense	334,031	333,389
Loss on disposal of assets	147	233
Deferred income tax expense	55,656	63,715
Changes in assets and liabilities:
Decrease (increase) in trade receivable, net	1,841,984	(984,778)
(Increase) decrease in income taxes receivable	(172,459)	774,880
Decrease (increase) in inventories, net	185,130	(2,172,380)
Increase in prepaid expenses and other current assets	(48,825)	(67,950)
(Decrease) increase in accounts payable	(303,595)	959,648
Decrease in accrued salaries and wages	(26,110)	(104,707)
Increase (decrease) in vacation accrual	42,273	(48,633)
Decrease in ESOP payable	(79,166)	(73,125)
Decrease in other accrued expenses	(247,038)	(437,007)
Increase (decrease) in payroll and other taxes withheld	3,773	(1,010)
Increase in income taxes payable	12,305	26,835
Net cash provided by operating activities	4,447,788	1,257,401
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(140,340)	(162,822)
Purchase of investment securities	(3,575,584)	(2,599,572)
Proceeds from sale/maturity of investment securities	2,343,942	3,262,397
Net cash (used in) provided by investing activities	(1,371,982)	500,003
Cash Flows from Financing Activities:
Dividends on common stock	(2,279,895)	(1,698,306)
Purchase of treasury stock	(355,418)	(320,504)
Proceeds from exercise of stock options	232,882	115,556
Excess tax benefits from share-based compensation	15,021	26,835
Net cash used in financing activities	(2,387,410)	(1,876,419)
Increase in cash and cash equivalents	688,396	(119,015)
Cash and cash equivalents, beginning of period	8,859,405	9,556,891
Cash and cash equivalents, end of period	9,547,801	9,437,876
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 1,143,000	$ 59,000