Note 8 - Segment Information (Tables)

12 Months Ended

Mar. 31, 2016

Notes Tables

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

	Chemical		Electronics			Engineering		Total
Year ended March 31, 2016
Revenue from external customers	$	1,412,179	$	849,447		$	2,251,444	$	4,513,070
Segment operating income (loss)	$	123,851	$	(146,570	)	$	285,702	$	262,983
Year ended March 31, 2015
Revenue from external customers	$	1,077,946	$	839,306		$	933,296	$	2,850,548
Segment operating income (loss)	$	126,907	$	(53,127	)	$	176,169	$	249,949
Total assets at March 31, 2016	$	1,070,944	$	644,189		$	1,707,413	$	3,422,546
Total assets at March 31, 2015	$	509,738	$	389,011		$	442,868	$	1,341,417