Note 6 - Disaggregated Revenues and Segment Information (Tables)

9 Months Ended

Dec. 31, 2023

Notes Tables

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

	Three months Ended December 31,
	2023		2022
Net Revenue in the US
Chemical	$	175,402	$	245,582
Electronics		423,593		485,454
Engineering		57,472		165,830
		656,467		896,866
Net Revenue outside the US
Chemical		40,029		86,296
Electronics		-		-
Engineering		-		-
		40,029		86,296
Total Revenues	$	696,496	$	983,162

	Nine Months Ended December 31,
	2023		2022
Net Revenue in the US
Chemical	$	598,176	$	811,596
Electronics		1,082,634		1,584,003
Engineering		294,337		411,387
		1,975,147		2,806,986
Net Revenue outside the US
Chemical		238,170		237,852
Electronics		-		-
Engineering		-		-
		238,170		237,852
Total Revenues	$	2,213,317	$	3,044,838