Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net income	$ 3,175,801	$ 3,183,127
Adjustments to reconcile net income to net cash provided by operating activities:
Excess tax benefits from share-based compensation	(17,141)	(26,835)
Tax effect of dividends on unallocated ESOP shares	35,204	24,862
Stock-based compensation	97,045	62,416
Depreciation	434,401	445,687
ESOP compensation expense	443,668	457,643
Loss on disposal of assets	147	380
Deferred income tax expense (benefit)	57,735	(66,958)
Changes in assets and liabilities:
Decrease (increase) in trade receivables, net	1,736,937	(3,499,723)
(Increase) decrease in income tax receivable	(329,298)	943,234
Decrease (increase) in inventories, net	852,216	(974,647)
Increase in prepaid expenses and other current assets	(7,748)	(34,164)
(Decrease) increase in accounts payable	(423,325)	248,831
Increase (decrease) in accrued salaries and wages	25,523	(81,602)
Increase (decrease) in vacation accrual	13,928	(2,453)
Decrease in other accrued expenses	(352,186)	(31,136)
Increase (decrease) in payroll and other taxes withheld	2,271	(6,471)
Increase in income taxes payable	14,424	29,551
Net cash provided by operating activities	5,759,602	671,742
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(284,210)	(266,029)
Purchase of investment securities	(4,930,146)	(3,921,537)
Proceeds from sale/maturity of investment securities	3,514,997	4,668,836
Net cash (used in) provided by investing activities	(1,699,359)	481,270
Cash Flows from Financing Activities:
Dividends on common stock	(2,846,690)	(1,698,306)
Purchase of treasury stock	(355,418)	(320,504)
Proceeds from exercise of stock options	296,963	141,477
Excess tax benefits from share-based compensation	17,141	26,835
Net cash used in financing activities	(2,888,004)	(1,850,498)
Increase (decrease) in cash and short term Investments	1,172,239	(697,486)
Cash and cash equivalents, beginning of the year	8,859,405	9,556,891
Cash and cash equivalents, end of the year	10,031,644	8,859,405
Supplemental Schedule of Cash Flow Information:
Income taxes paid	1,511,000	384,000
Supplemental Schedule of Non-cash Financing Activities:
Accrual of dividends		$ 590,672