CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income	$ 77,500	$ 226,300
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Loss on sale of investments	17,300	7,400
Depreciation and amortization	154,000	132,400
Deferred income tax (benefit)	(11,400)	16,200
Stock-based compensation	14,900	7,600
Changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	(319,400)	(108,200)
Inventories	(399,700)	(631,500)
Prepaid expenses and other current assets	(66,900)	104,200
Accounts payable	77,900	24,800
Customer advances	256,000	404,700
Accrued expenses and taxes	19,900	143,700
Other assets		1,600
Total adjustments	(257,400)	102,900
Net cash provided by (used in) operating activities	(179,900)	329,200
Investing activities:
Cash paid for asset acquisition	(700,000)
Redemption of investment securities, available-for-sale	450,900	717,600
Purchase of investment securities, available for sale	(25,000)	(716,900)
Capital expenditures	(47,100)	(28,100)
Purchase of other intangible assets	(2,900)	(2,100)
Net cash used in investing activities	(324,100)	(29,500)
Financing activities:
Line of credit proceeds	150,000
Line of credit repayments	(70,000)
Payments of contingent consideration	(1,100)	(25,900)
Proceeds from exercise of stock options	6,700
Cash dividend declared and paid	(107,400)	(40,100)
Principal payments on note payable	(58,500)	(56,600)
Net cash used in financing activities	(80,300)	(122,600)
Net increase (decrease) in cash and cash equivalents	(584,300)	177,100
Cash and cash equivalents, beginning of year	927,300	769,300
Cash and cash equivalents, end of period	343,000	946,400
Cash paid during the period for:
Income Taxes	152,100
Interest	$ 2,400	$ 3,800