Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 183,277	$ 147,801	$ 364,518	$ 290,973
Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	48,967	42,624	96,305	81,268
Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	132,406	104,126	264,251	207,572
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,904	1,051	3,962	2,133
Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue	83,168	61,171	169,018	132,673
Industrial [Member] | Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	13,663	9,313	25,506	18,137
Industrial [Member] | Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	68,150	51,155	140,716	112,997
Industrial [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,355	703	2,796	1,539
Water Treatment [Member]
Disaggregation of Revenue [Line Items]
Revenue	62,111	49,540	118,349	89,254
Water Treatment [Member] | Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,242	4,358	9,795	8,233
Water Treatment [Member] | Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	56,373	44,838	107,601	80,344
Water Treatment [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	496	344	953	677
Health and Nutrition [Member]
Disaggregation of Revenue [Line Items]
Revenue	37,998	37,090	77,151	69,046
Health and Nutrition [Member] | Bulk / Distributed specialty products [Member]
Disaggregation of Revenue [Line Items]
Revenue	30,062	28,953	61,004	54,898
Health and Nutrition [Member] | Manufactured, blended or repackaged products [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,883	8,133	15,934	14,231
Health and Nutrition [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 53	$ 4	$ 213	$ (83)