v3.26.1
Note 6 - Disaggregated Revenues and Segment Information - Net Revenue, Classified by Geography (Details) - USD ($)
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Revenue from Contract with Customer, Including Assessed Tax $ 866,255 $ 973,675
UNITED STATES    
Revenue from Contract with Customer, Including Assessed Tax 759,124 837,260
UNITED STATES | Chemical [Member]    
Revenue from Contract with Customer, Including Assessed Tax 218,729 198,645
UNITED STATES | Electronics [Member]    
Revenue from Contract with Customer, Including Assessed Tax 472,990 514,682
UNITED STATES | Engineering [Member]    
Revenue from Contract with Customer, Including Assessed Tax 67,405 123,933
Non-US [Member]    
Revenue from Contract with Customer, Including Assessed Tax 107,131 136,415
Non-US [Member] | Chemical [Member]    
Revenue from Contract with Customer, Including Assessed Tax 107,131 136,415
Non-US [Member] | Electronics [Member]    
Revenue from Contract with Customer, Including Assessed Tax 0 0
Non-US [Member] | Engineering [Member]    
Revenue from Contract with Customer, Including Assessed Tax $ 0 $ 0