Segment Information (Tables)

6 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Summary of Segment Information

(In thousands)	Industrial		Water Treatment		Health and Nutrition		Total
Three months ended September 30, 2018:
Sales	$	69,402	$	42,713	$	33,209	$	145,324
Gross profit	8,328		11,710		5,734		25,772
Selling, general, and administrative expenses	5,790		5,055		4,096		14,941
Operating income	2,538		6,655		1,638		10,831
Three months ended October 1, 2017:
Sales	$	58,689	$	38,217	$	28,489	$	125,395
Gross profit	8,308		11,028		4,779		24,115
Selling, general, and administrative expenses	5,295		5,042		4,491		14,828
Operating income	3,013		5,986		288		9,287
Six months ended September 30, 2018:
Sales	$	143,420	$	83,582	$	68,122	$	295,124
Gross profit	18,771		23,147		12,311		54,229
Selling, general and administrative expenses	11,277		10,156		8,487		29,920
Operating income	7,494		12,991		3,824		24,309
Six months ended October 1, 2017:
Sales	$	122,716	$	76,441	$	59,969	$	259,126
Gross profit	17,281		22,231		10,602		50,114
Selling, general and administrative expenses	11,051		10,299		9,244		30,594
Operating income	6,230		11,932		1,358		19,520