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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

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