Note 10 - Segment Information (Tables)

12 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Chemical			Electronics			Engineering			Total
Twelve months ended March 31, 2024
Revenue from external customers	$	1,101,016		$	1,512,692		$	351,698		$	2,965,406
Segment operating loss	$	(407,230	)	$	(371,103	)	$	(41,563	)	$	(819,896	)
Twelve months ended March 31, 2023
Revenue from external customers	$	1,258,890		$	1,883,251		$	534,644		$	3,676,785
Segment operating income	$	(49,966	)	$	(65,271	)	$	145,572		$	30,335
Total assets at March 31, 2024	$	791,329		$	1,090,751		$	256,648		$	2,138,728
Total assets at March 31, 2023	$	1,050,541		$	1,575,811		$	463,473		$	3,089,825