CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income	$ 165,600	$ 8,700
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	428,900	434,800
Impairment of intangible assets	212,700	0
Gain on sale of property and equipment	(300)
Deferred income tax benefit	(149,200)	(34,700)
Loss on sale of investment securities	0	4,200
Income tax benefit of stock options exercised	0	4,900
Stock-based compensation	11,800	10,900
Change in fair value of contingent consideration	110,000	0
Changes in operating assets and liabilities:
Trade accounts receivable	(150,200)	(325,000)
Inventories	(198,400)	95,500
Prepaid and other current assets	21,400	54,500
Other assets	0	(24,300)
Accounts payable	114,800	(146,100)
Customer advances	(76,400)	(13,100)
Accrued expenses and taxes	389,700	77,100
Total adjustments	714,800	138,700
Net cash provided by operating activities	880,400	147,400
Investing activities:
(Increase) decrease in restricted cash	300,000	(300,000)
Proceeds from sale of property and equipment	3,000	0
Purchase of investment securities, available for sale	(2,700)	(3,800)
Redemption of investment securities, available-for-sale	0	127,000
Capital expenditures	(92,000)	(67,300)
Purchase of other intangible assets	(13,900)	(6,600)
Net cash prodived by (used in) investing activities	194,400	(250,700)
Financing activities:
Proceeds from notes	20,000	200,000
Line of credit proceeds	970,000	250,000
Line of credit repayments	(970,000)	(250,000)
Payments for contingent consideration	(130,800)	(132,900)
Proceeds from exercise of stock options	0	51,200
Principal payments on note payable	(201,000)	(26,700)
Net cash provided by (used in) financing activities	(311,800)	91,600
Net increase (decrease) in cash and cash equivalents	763,000	(11,700)
Cash and cash equivalents, beginning of year	482,000	493,700
Cash and cash equivalents, end of year	1,245,000	482,000
Cash paid during the period for:
Income Taxes	34,500	1,800
Interest	$ 33,900	$ 4,200