FOREIGN SALES AND SIGNIFICANT CUSTOMERS, SALES BY COUNTRY (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Document Fiscal Year Focus	2018
Net sales	$ 23,515,441	$ 24,054,281
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	16,564,924	15,965,159
Non-U.S. Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,950,517	8,089,122
People's Republic of China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,602,588	2,332,704
Sweden
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,436,561	1,056,746
Czech Republic
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,298,220	1,107,555
Malaysia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	543,093	647,707
Russian Federation
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	491,649	522,080
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	414,350	547,745
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,164,056	$ 1,874,585