Note 11 - Disaggregated Revenues and Segment Information (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

Revenue from External Customers by Geographic Areas [Table Text Block]

	Twelve Months Ended March 31,
	2023		2022
Net Revenue in the US
Chemical	$	909,221	$	1,033,394
Electronics		1,883,251		1,405,594
Engineering		534,644		481,422
		3,327,116		2,920,410
Net Revenue outside the US
Chemical		349,669		286,184
Electronics		-		-
Engineering		-		-
		349,669		286,184
Total Revenues	$	3,676,785	$	3,206,594