XML 146 R85.htm IDEA: XBRL DOCUMENT
v3.23.2

Concentrations of Credit Risk and Major Customers (Details) - Schedule of revenue by major customers by reporting segments | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Schedule of Revenue by Major Customers by Reporting Segments [Abstract] |  |  |  |
Accounts Receivable ,Percentage |  | 94.80% | 76.60% | 87.80%
Customer B [Member] |  |  |  |
Schedule of Revenue by Major Customers by Reporting Segments [Abstract] |  |  |  |
Accounts Receivable ,Percentage | [1] | 35.30% | 33.40% | 46.60%
Customer C [Member] |  |  |  |
Schedule of Revenue by Major Customers by Reporting Segments [Abstract] |  |  |  |
Accounts Receivable ,Percentage | [2] | 33.00% | 26.50% | 25.90%
Customer D [Member] |  |  |  |
Schedule of Revenue by Major Customers by Reporting Segments [Abstract] |  |  |  |
Accounts Receivable ,Percentage | [1] | 16.50% | 16.70% | 15.30%
Customer E [Member] |  |  |  |
Schedule of Revenue by Major Customers by Reporting Segments [Abstract] |  |  |  |
Accounts Receivable ,Percentage | [1] | 10.00% |  |
[1] | Sales to this customer were reported in both of the Metal Stamping and Mechanical OEM and Electric OEM operating segments.
[2] | Sales to this customer was reported in the Metal Stamping operating segment.

X
- Definition Percentage of accounts receivable during the period. + References No definition available. + Details
Name: | hiho_AccountsReceivablePercentage
Namespace Prefix: | hiho_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=hiho_CustomerBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hiho_CustomerCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hiho_CustomerDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hiho_CustomerEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |