1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
May 31, 2019
Furniture and fixtures \| Minimum
Useful life	2 years
Furniture and fixtures \| Maximum
Useful life	6 years
Machinery and equipment \| Minimum
Useful life	3 years
Machinery and equipment \| Maximum
Useful life	6 years
Test equipment \| Minimum
Useful life	4 years
Test equipment \| Maximum
Useful life	6 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration