FOREIGN SALES AND SIGNIFICANT CUSTOMERS, SALES BY COUNTRY (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 24,054,281	$ 26,001,346
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	15,965,159	15,496,763
Non-U.S. Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	8,089,122	10,504,583
People's Republic of China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,332,704	969,848
Czech Republic
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,107,555	1,231,731
Sweden
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,056,746	4,322,582
Malaysia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	647,707	669,782
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	547,745	400,672
Russian Federation
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	522,080	125,362
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,874,585	$ 2,784,606