CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income (loss)	$ 226,300	$ (4,200)
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on sale of investments	7,400
Depreciation and amortization	132,400	141,600
Deferred income tax benefit	16,200	1,700
Stock-based compensation	7,600	5,700
Changes in operating assets and liabilities:
Accounts receivable	(108,200)	51,000
Inventories	(631,500)	(492,600)
Prepaid expenses and other current assets	104,200	41,000
Accounts payable	24,800	23,500
Customer advances	404,700	307,100
Accrued expenses and taxes	143,700	5,900
Other assets	1,600
Total adjustments	102,900	84,900
Net cash provided by operating activities	329,200	80,700
Investing activities:
Intangible assets acquired in acquisition of SBI		(260,000)
Redemption of investment securities, available for sale	717,600
Purchase of investment securities, available for sale	(716,900)	(8,300)
Capital expenditures	(28,100)	(66,100)
Purchase of other intangible assets	(2,100)	(4,900)
Net cash used in investing activities	(29,500)	(339,300)
Financing activities:
Line of credit proceeds		60,000
Line of credit repayments		(60,000)
Payments of contingent consideration	(25,900)	(16,100)
Proceeds from exercise of stock options		9,600
Cash dividend declared and paid	(40,100)	(59,900)
Principal payments on note payable	(56,600)	(30,600)
Net cash used in financing activities	(122,600)	(97,000)
Net increase (decrease) in cash and cash equivalents	177,100	(355,600)
Cash and cash equivalents, beginning of year	769,300	907,800
Cash and cash equivalents, end of period	946,400	552,200
Supplemental disclosures
Cash paid during the period for: income taxes		3,300
Cash paid during the period for: interest	$ 3,800	$ 2,900