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Unaudited Quarterly Financial Information | 12 Months Ended
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Dec. 28, 2019
Unaudited Quarterly Financial Information [Abstract] |
UNAUDITED QUARTERLY FINANCIAL INFORMATION | 20. UNAUDITED QUARTERLY FINANCIAL INFORMATION Quarterly Results of Operations
|  | For the quarter ended |
|  | Dec 28, |  |  | Sept 28, |  |  | Jun 29, |  |  | Mar 30, |
|  | 2019 |  |  | 2019 |  |  | 2019 |  |  | 2019 |
Net sales |  | $ | 125,927 |  |  | $ | 138,045 |  |  | $ | 143,842 |  |  | $ | 146,851 |
Gross profit |  |  | 47,427 |  |  |  | 52,119 |  |  |  | 56,227 |  |  |  | 56,509 |
Operating income |  |  | 18,772 |  |  |  | 19,138 |  |  |  | 26,373 |  |  |  | 25,832 |
Income before income taxes |  |  | 16,861 |  |  |  | 15,462 |  |  |  | 21,925 |  |  |  | 21,059 |
Net income |  |  | 13,809 |  |  |  | 12,791 |  |  |  | 17,265 |  |  |  | 16,404 |
Basic and diluted net income per common share |  | $ | 0.43 |  |  | $ | 0.40 |  |  | $ | 0.54 |  |  | $ | 0.51 |
|  | For the quarter ended |
|  | Dec 29, |  |  | Sept 29, |  |  | Jun 30, |  |  | Mar 31, |
|  | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2018 |
Net sales |  | $ | 138,722 |  |  | $ | 135,837 |  |  | $ | 136,168 |  |  | $ | 97,318 |
Gross profit |  |  | 52,927 |  |  |  | 51,735 |  |  |  | 50,404 |  |  |  | 37,617 |
Operating income |  |  | 22,052 |  |  |  | 19,246 |  |  |  | 17,003 |  |  |  | 17,253 |
Income before income taxes |  |  | 17,032 |  |  |  | 14,250 |  |  |  | 9,220 |  |  |  | 15,893 |
Net income |  |  | 16,424 |  |  |  | 11,599 |  |  |  | 6,796 |  |  |  | 11,911 |
Basic and diluted net income per common share |  | $ | 0.51 |  |  | $ | 0.36 |  |  | $ | 0.22 |  |  | $ | 0.40 |

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- Definition Unaudited quarterly financial information. + References No definition available. + Details
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Namespace Prefix: | hlio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
Name: | us-gaap_QuarterlyFinancialInformationTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration