Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 181,241	$ 143,172
Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	47,338	38,644
Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	131,845	103,446
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,058	1,082
Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue	85,850	71,502
Industrial [Member] | Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	11,843	8,824
Industrial [Member] | Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	72,566	61,842
Industrial [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,441	836
Water Treatment [Member]
Disaggregation of Revenue [Line Items]
Revenue	56,238	39,714
Water Treatment [Member] | Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,553	3,875
Water Treatment [Member] | Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	51,228	35,506
Water Treatment [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	457	333
Health and Nutrition [Member]
Disaggregation of Revenue [Line Items]
Revenue	39,153	31,956
Health and Nutrition [Member] | Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	30,942	25,945
Health and Nutrition [Member] | Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,051	6,098
Health and Nutrition [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 160	$ (87)