Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities:
Net income	$ (4,200)	$ 252,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	141,600	142,200
Deferred income taxe (benefit)	1,700	(14,800)
Stock-based compensation	5,700	20,800
Changes in operating assets and liabilities:
Accounts receivable	51,000	871,100
Inventories	(492,600)	(94,600)
Prepaid expenses and other current assets	41,000	(39,300)
Accounts payable	23,500	(114,300)
Customer advances	307,100	0
Accrued expenses and taxes	5,900	(148,200)
Total adjustments	84,900	622,900
Net cash provided by operating activities	80,700	874,900
Investing activities:
Additional consideration for acquisition of Altamira Instruments, Inc.	0	(182,600)
Intangible assets acquired in acquisition (note 3)	(260,000)	0
Purchase of investment securities, available for sale	(8,300)	(11,100)
Capital expenditures	(66,100)	(61,500)
Purchase of intangible assets, other	(4,900)	(8,800)
Net cash used in investing activities	(339,300)	(264,000)
Financing activities:
Line of credit proceeds	60,000	0
Line of credit repayments	(60,000)	0
Payments for contingent consideration	(16,100)	0
Proceeds from exercise of stock options	9,600	0
Cash dividend declared and paid	(59,900)	(107,700)
Principal payments on note payable	(30,600)	0
Net cash used in financing activities	(97,000)	(107,700)
Net increase (decrease) in cash and cash equivalents	(355,600)	503,200
Cash and cash equivalents, beginning of year	907,800	632,700
Cash and cash equivalents, end of year	552,200	1,135,900
Supplemental disclosures of cash flow information:
Cash paid for income taxes	3,300	298,400
Non-cash investing and financing activities:
Fair value of stock issued for acquisition	400,000	0
Fair value of note payable issued for acquisition	230,000	0
Fair value of contingent consideration payable in connection with acquisition	$ 128,000	$ 0