Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2017	Jun. 30, 2017
Current assets:
Cash and cash equivalents	$ 10,528,041	$ 11,557,071
Accounts receivable, less allowance for doubtful accounts of $96,868 and $96,868, respectively	4,153,511	5,133,389
Inventories, net	5,206,025	4,992,434
Prepaid expenses and other current assets	504,653	918,899
Total current assets	20,392,230	22,601,793
Property, plant and equipment, net of accumulated amortization and depreciation of $8,134,134 and $7,794,580, respectively	3,842,419	3,730,203
Patents, net of accumulated amortization of $1,025,930 and $995,568, respectively	715,177	719,136
Goodwill	1,701,094	1,701,094
Intangible and other assets	280,684	282,876
Deferred income tax	5,524,422	4,334,547
Total assets	32,456,026	33,369,649
Current liabilities:
Accounts payable	2,106,506	1,861,228
Accrued expenses and other current liabilities	1,815,527	3,346,138
Total current liabilities	3,922,033	5,207,366
Deferred lease liability	7,016	9,354
Deferred income	8,989	13,087
Total liabilities	3,938,038	5,229,807
Commitments and contingencies (Note 9)
Shareholders' equity:
Common stock, $.01 par value-shares authorized 20,000,000; 9,365,666 and 9,357,166 shares issued and outstanding in each period, respectively	93,657	93,572
Additional paid-in capital	37,490,220	36,808,810
Accumulated deficit	(9,065,889)	(8,762,540)
Total shareholders' equity	28,517,988	28,139,842
Total liabilities and shareholders' equity	$ 32,456,026	$ 33,369,649