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5. REVENUE RECOGNITION (Tables)
3 Months Ended
Sep. 30, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenues
   Three Months
Ended September 30,
 
   2019   2018 
Engineering Design Services  $409,728   $511,898 
Optical Components   1,416,244    298,057 
Medical Device Products & Assemblies   689,012    749,503 
Total Revenues  $2,514,984   $1,559,458