Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net income	$ 59,400	$ 2,200
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	47,100	47,400
Deferred income taxes	3,400	(5,600)
Stock-based compensation	600	3,100
Changes in operating assets and liabilities:
Accounts receivable	(232,600)	729,800
Inventories	47,200	(294,700)
Prepaid expenses and other current assets	48,800	(22,000)
Accounts payable	(21,300)	(157,200)
Customer advances	0	128,500
Accrued expenses and taxes	(18,200)	(72,500)
Total adjustments	(125,000)	356,800
Net cash provided by (used in) operating activities	(65,600)	359,000
Investing activities:
Additional consideration for acquisition of Altamira Instruments, Inc.	0	(139,900)
Purchase of investment securities, available for sale	(2,900)	(3,400)
Capital expenditures	(54,900)	(5,200)
Purchase of intangible assets	(1,300)	(3,300)
Net cash used in investing activities	(59,100)	(151,800)
Financing activities:
Net increase (decrease) in cash and cash equivalents	(124,700)	207,200
Cash and cash equivalents, beginning of year	907,800	632,700
Cash and cash equivalents, end of year	783,100	839,900
Supplemental disclosures of cash flow information:
Cash paid for income taxes	$ 1,500	$ 94,000