XML 27 R16.htm IDEA: XBRL DOCUMENT v3.22.2.2
GEOGRAPHIC INFORMATION (Tables)
3 Months Ended
Aug. 31, 2022
Geographic Information Disclosure Abstract  
Revenue from External Customers by Geographic Areas [Table Text Block]

Three Months Ended August 31,

2022

2021

Revenues from sales to unaffiliated customers:

Asia

$

814,000

 

$

675,000

Europe

552,000

471,000

North America

 

268,000

 

 

105,000

South America

3,000

3,000

Middle East

 

-

 

 

8,000

$

1,637,000

$

1,262,000