XML 53 R39.htm IDEA: XBRL DOCUMENT
v3.19.2

Concentrations of Credit Risk and Major Customers (Tables) | 12 Months Ended
--- | ---
Mar. 31, 2019
Risks and Uncertainties [Abstract] |
Schedule of accounts receivable |
|  | Percentage of |
|  | accounts receivable |
|  | 2018 |  |  | 2019 |
|  | % |  |  | % |
Customer A |  |  | 54.9 |  |  |  | 61.1 |
Customer B |  |  | 9.0 |  |  |  | 10.2 |
Customer C |  |  | 9.0 |  |  |  | 6.9 |
Three largest receivable balances |  |  | 72.9 |  |  |  | 78.2 |
Schedule of revenue by major customers by reporting segments |
|  | Year ended March 31, |
|  | 2017 |  |  | 2018 |  |  | 2019 |
|  | % |  |  | % |  |  | % |
Customer A (note a) |  |  | 46.0 |  |  |  | 51.4 |  |  |  | 47.7 |
Customer B (note a) |  |  | 10.7 |  |  |  | 15.8 |  |  |  | 18.0 |
Customer C (note b) |  |  | 11.6 |  |  |  | 10.8 |  |  |  | 11.2 |
Customer D (note b) |  |  | 11.0 |  |  |  | N/A |  |  |  | N/A |
|  |  | 79.3 |  |  |  | 78.0 |  |  |  | 76.9 |
Notes:
| (a) | Sales to this customer were reported in both of the Metal Stamping and Mechanical OEM and Electric OEM operating segments.
| (b) | Sales to this customer were reported in the Electric OEM operating segment.

X
- Definition Tabular disclosure of accounts receivable from the three customers with the largest receivable. + References No definition available. + Details
Name: | hiho_ScheduleOfAccountsReceivable
Namespace Prefix: | hiho_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration