CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating activities:
Net income (loss)	$ (62,200)	$ 59,400
Depreciation and amortization	44,300	47,100
Deferred income taxes	5,100	3,400
Stock-based compensation	3,400	600
Changes in operating assets and liabilities:
Accounts receivable	(15,600)	(232,600)
Inventories	(134,600)	47,200
Prepaid expenses and other current assets	17,400	48,800
Other assets	100
Accounts payable	63,900	(21,300)
Customer advances	102,400
Accrued expenses and taxes	(4,400)	(18,200)
Total adjustments	82,000	125,000
Net cash provided by (used in) operating activities	19,800	(65,600)
Investing activities:
Purchase of investment securities, available for sale	(2,300)	(2,900)
Capital expenditures	(17,400)	(54,900)
Purchase of intangible assets	(2,100)	(1,300)
Net cash used in investing activities	(21,800)	(59,100)
Financing activities:
Principal payments on note payable	(18,700)
Net decrease in cash and cash equivalents	(20,700)	(124,700)
Cash and cash equivalents, beginning of period	769,300	907,800
Cash and cash equivalents, end of period	748,600	783,100
Supplemental disclosures
Cash paid during the period for: income taxes		1,500
Cash paid during the period for: interest	$ 1,400