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OPERATING SEGMENT INFORMATION (Details - Revenues) - USD ($)
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues $ 39,021,996 $ 34,478,358
Reportable Subsegments [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 39,022,000 34,478,000
UNITED STATES    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 25,670,000 21,017,000
CHINA    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 5,640,000  
APAC Region [Member] | CHINA    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues   5,093,000
GERMANY    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 2,787,000 3,375,000
POLAND    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues 3,111,000 2,675,000
Other Foreign Countries [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenues $ 1,814,000 $ 2,318,000