CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating activities:
Net income (loss)	$ 34,300	$ (299,300)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Loss on sale of investments	0	1,300
Loss on asset disposal	2,700	0
Depreciation and amortization	210,800	220,100
Deferred income tax benefit	(30,000)	(15,100)
Stock-based compensation	1,200	2,100
Income tax benefit of stock options exercised	0	4,900
Changes in operating assets and liabilities:
Accounts receivable	211,600	25,700
Inventories	(1,048,800)	(106,900)
Prepaid expenses and other current assets	13,000	(37,200)
Other assets	0	(25,400)
Accounts payable	144,500	48,700
Customer advances	33,700	(77,500)
Accrued expenses and taxes	259,600	(149,200)
Total adjustments	(201,700)	(108,500)
Net cash used in operating activities	(167,400)	(407,800)
Investing activities:
Purchase of investment securities, available for sale	(2,700)	(3,800)
Capital expenditures	(8,400)	(52,900)
Purchase of other intangible assets	(5,700)	(3,400)
Redemption of investment securities, available for sale	0	75,000
Net cash provided by (used in) investing activities	(16,800)	14,900
Financing activities:
Line of credit proceeds	470,000	250,000
Payments of contingent consideration	(100,900)	(98,900)
Proceeds from exercise of stock options	0	18,800
Principal payments on note payable	0	(26,700)
Net cash provided by financing activities	369,100	143,200
Net increase (decrease) in cash and cash equivalents	184,900	(249,700)
Cash and cash equivalents, beginning of year	482,000	493,700
Cash and cash equivalents, end of period	666,900	244,000
Cash paid during the period for:
Income Taxes	18,500	3,500
Interest	$ 4,400	$ 2,700