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Inventories-Textual (Details) - USD ($) $ in Millions | Mar. 28, 2021 | Mar. 29, 2020
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Inventories (Textual) [Abstract] |  |
Finished goods (LIFO basis) | $ 46.8 | $ 43.3

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- Definition Inventories. + References No definition available. + Details
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Namespace Prefix: | hwkn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant