Consolidated Balance Sheets (unaudited) - USD ($)	Sep. 30, 2016	Jun. 30, 2016
Current assets:
Cash and cash equivalents	$ 8,600,821	$ 9,049,327
Accounts receivable, less allowance for doubtful accounts of $96,868 and $98,868, respectively	3,841,068	3,869,427
Inventories, net	5,177,561	5,822,935
Prepaid expenses and other current assets	469,518	530,564
Total current assets	18,088,968	19,272,253
Property, plant and equipment, net of accumulated amortization and depreciation of $7,136,072 and $6,976,282, respectively	2,883,301	2,492,815
Patents, net of accumulated amortization of $911,637 and $885,394, respectively	662,794	604,916
Goodwill	1,701,094	1,701,094
Intangible and other assets	287,380	266,603
Deferred income tax	3,422,690	3,394,690
Total assets	27,046,227	27,732,371
Current liabilities:
Accounts payable	1,195,749	1,402,797
Accrued expenses and other current liabilities	2,160,870	1,887,337
Total current liabilities	3,356,619	3,290,134
Deferred lease liability	9,285	9,262
Deferred income	27,035	31,685
Total liabilities	3,392,939	3,331,081
Commitments and contingencies (Footnote 9)
Shareholders' equity:
Common stock, $.01 par value-shares authorized 20,000,000; 7,948,234 shares issued and 7,809,385 outstanding in each period	79,482	79,482
Additional paid-in capital	32,276,402	32,502,521
Accumulated deficit	(7,603,244)	(7,081,361)
Treasury stock, at cost, 138,849 shares in each period	(1,099,352)	(1,099,352)
Total shareholders' equity	23,653,288	24,401,290
Total liabilities and shareholders' equity	$ 27,046,227	$ 27,732,371