Statements of Cash Flows (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities:
Net income	$ 4,390,268	$ 3,857,537
Adjustments to reconcile net income to net cash provided by operating activities:
Excess tax benefits from share-based compensation	(40,801)	(10,939)
Stock-based compensation	98,723	66,237
Depreciation	426,389	467,296
ESOP compensation expense	507,398	502,990
Loss on disposal of assets	21,412	99,471
Deferred income tax benefit	(111,465)	12,114
Changes in assets and liabilities:
Decrease (increase) in trade receivables, net	3,048,890	(771,514)
(Increase) decrease in inventories, net	(1,066,646)	362,326
Decrease (increase) in prepaid expenses and other current assets	8,582	(23,072)
Decrease in accounts payable	(144,670)	(153,440)
Increase in accrued salaries, wages and commissions	5,122	209,120
Increase (decrease) in other accrued expenses	321,669	(56,060)
Increase in vacation accrual	84,003	79,736
Increase (decrease) in payroll and other taxes withheld and accrued	801	(2,245)
(Decrease) increase in income taxes payable	(163,349)	273,892
Net cash provided by operating activities	7,386,326	4,913,449
Cash Flows From Investing Activities:
Additions to property, plant and equipment	(267,983)	(607,311)
Proceeds on sale of assets		54,860
Payment for loan receivable		(125,000)
Proceeds from loan receivable	40,932	28,243
Purchase of investment securities	(4,523,363)	(3,091,032)
Proceeds from maturity of investment securities	3,287,138	8,256,000
Net cash (used in) provided by investing activities	(1,463,276)	4,515,760
Cash Flows From Financing Activities:
Sale of treasury stock	58,975	12,081
Dividends on common stock	(4,116,532)	(4,080,492)
Purchase of treasury stock	(143,731)	(575,246)
Proceeds from exercise of stock options	65,050	424,254
Excess tax benefits from share-based compensation	40,801	10,939
Net cash used in financing activities	(4,095,437)	(4,208,464)
Increase in cash and cash equivalents	1,827,613	5,220,745
Cash and cash equivalents, beginning of year	9,695,811	4,475,066
Cash and cash equivalents, end of year	11,523,424	9,695,811
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 1,966,000	$ 1,238,000