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Note 6 - Disaggregated Revenues and Segment Information (Tables)
3 Months Ended
Jun. 30, 2022
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
   

Three Months Ended June 30,

 
   

2022

   

2021

 

Net Revenue in the US

               

Chemical

  $ 246,900     $ 233,304  

Electronics

    475,492       222,574  

Engineering

    73,741       183,527  
      796,133       639,405  
                 

Net Revenue outside the US

               

Chemical

    125,275       81,953  

Electronics

    -       -  

Engineering

    -       -  
      125,275       81,953  
                 

Total Revenues

  $ 921,408     $ 721,358  
Schedule of Segment Reporting Information, by Segment [Table Text Block]

Information about segments is as follows:

                               
                                 
   

Chemical

   

Electronics

   

Engineering

   

Total

 

Three months ended June 30, 2022

                               

Revenue from external customers

  $ 372,175     $ 464,692     $ 84,541     $ 921,408  

Segment operating income/(loss)

  $ 11,393     $ (66,655 )   $ 20,637     $ (34,625 )
                                 

Three months ended June 30, 2021

                               

Revenue from external customers

  $ 315,257     $ 222,574     $ 183,527     $ 721,358  

Segment operating income/(loss)

  $ (11,107 )   $ (93,473 )   $ 61,583     $ (42,997 )
                                 
                                 

Total assets at June 30, 2022

  $ 1,397,658     $ 1,704,462     $ 306,803     $ 3,408,923  
                                 

Total assets at March 31, 2022

  $ 1,332,867     $ 1,430,395     $ 487,635     $ 3,250,897