• Filing Date: 2018-08-20
  • Form Type: 10-Q
  • Description: Quarterly report
v3.10.0.1
Note 5 - Net Revenues and Segment Information - Summary of Segment Information (Details) - USD ($)
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Revenue from external customers $ 756,967 $ 1,146,355  
Segment operating income 17,096 3,741  
Total assets 4,556,392   $ 4,552,134
Chemical [Member]      
Revenue from external customers 359,171 308,355  
Segment operating income 40,575 65,446  
Total assets 2,161,949   1,687,276
Electronics [Member]      
Revenue from external customers 148,966 493,592  
Segment operating income (62,843) (140,271)  
Total assets 896,667   1,280,908
Engineering [Member]      
Revenue from external customers 248,830 344,408  
Segment operating income 39,364 $ 78,566  
Total assets $ 1,497,776   $ 1,583,950