Consolidated Balance Sheets (Unaudited) - USD ($)	Dec. 31, 2017	Jun. 30, 2017
Current assets:
Cash and cash equivalents	$ 12,102,430	$ 11,557,071
Accounts receivable, less allowance for doubtful accounts of $96,868 and $96,868, respectively	4,326,379	5,133,389
Inventories, net	5,048,875	4,992,434
Prepaid expenses and other current assets	328,621	918,899
Total current assets	21,806,305	22,601,793
Property, plant and equipment, net of accumulated amortization and depreciation of $8,437,445 and $7,794,580, respectively	3,887,265	3,730,203
Patents, net of accumulated amortization of $1,057,851 and $995,568, respectively	715,032	719,136
Goodwill	1,701,094	1,701,094
Intangible and other assets	262,264	282,876
Deferred income tax		4,334,547
Total assets	28,371,960	33,369,649
Current liabilities:
Accounts payable	1,651,078	1,861,228
Accrued expenses and other current liabilities	1,876,047	3,346,138
Total current liabilities	3,527,125	5,207,366
Deferred lease liability	4,677	9,354
Deferred income	2,165,993	13,087
Total liabilities	5,697,795	5,229,807
Commitments and contingencies (Note 9)
Shareholders' equity:
Common stock, $.01 par value-shares authorized 20,000,000; 9,400,666 and 9,357,166 shares issued and outstanding, respectively	94,007	93,572
Additional paid-in capital	38,502,821	36,808,810
Accumulated deficit	(15,922,663)	(8,762,540)
Total shareholders' equity	22,674,165	28,139,842
Total liabilities and shareholders' equity	$ 28,371,960	$ 33,369,649