CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities:
Net loss	$ (48,800)	$ (60,100)
Adjustments to reconcile net loss to net cash used in operating activities:
Loss on asset disposal	0	2,700
Depreciation and amortization	95,700	105,200
Deferred income taxes	15,500	(17,800)
Stock-based compensation	700	600
Changes in operating assets and liabilities:
Accounts receivable	80,200	344,300
Inventories	(189,000)	(130,100)
Prepaid expenses and other current assets	(164,100)	(76,700)
Accounts payable	(22,000)	(26,500)
Customer advances	403,800	17,100
Accrued expenses and taxes	(323,700)	(203,100)
Total adjustments	(102,900)	15,700
Net cash used in operating activities	(151,700)	(44,400)
Investing activities:
Capital expenditures	0	(6,500)
Purchase of intangible assets	(8,400)	0
Net cash used in investing activities	(8,400)	(6,500)
Financing activities:
Line of credit proceeds	0	200,000
Payments of contingent consideration	(117,400)	(100,900)
Principal payments on note payable	(1,500)	0
Net cash provided by (used in) financing activities	(118,900)	99,100
Net increase (decrease) in cash and cash equivalents	(279,000)	48,200
Cash and cash equivalents, beginning of year	1,245,000	482,000
Cash and cash equivalents, end of period	966,000	530,200
Cash paid during the period for:
Income Taxes	186,000	18,500
Interest	$ 200	$ 4,400