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Segment Information-Textual (Details) $ in Millions | 12 Months Ended
--- | ---
Apr. 01, 2018 USD ($) Segment Customer | Apr. 02, 2017 USD ($) | Apr. 03, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments (segment) | Segment | 3 |  |
Intersegment Sales | $ 0.0 |  |
Number of Operating Segments Aggregated | Segment | 0 |  |
Number of customers representing 10% or more of revenue (customers) | Customer | 0 |  |
Stauber Performance Ingredients [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Business Combination, Acquisition Related Costs |  |  | $ 3.3
Health and Nutrition [Member] | Scenario, Previously Reported [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Corporate expenses allocated to segments | $ 2.1 | $ 1.9 |
Industrial [Member] | Scenario, Plan [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Corporate expenses allocated to segments | 1.3 | 1.2 |
Water Treatment [Member] | Scenario, Plan [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Corporate expenses allocated to segments | $ 0.8 | $ 0.7 |

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- Definition Corporate expenses allocated to segments + References No definition available. + Details
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- Definition Entity wide revenue major customer number of customers. + References No definition available. + Details
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Namespace Prefix: | hwkn_
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- Definition Intersegment sales. + References No definition available. + Details
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- Definition Number of operating segments aggregated. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
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- Details
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- Details
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- Details
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