XML 117 R37.htm IDEA: XBRL DOCUMENT
v2.4.0.8

CONCENTRATIONS OF CREDIT RISK AND MAJOR CUSTOMERS (TABLES) | 12 Months Ended
--- | ---
Mar. 31, 2014
Concentration Of Credit Risk and Major Customers [Abstract] |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
| Accounts receivable from the three customers with the largest receivable balances as of March 31, 2013 and 2014 are as follows:
|  | Percentage of
|  | accounts receivable
|  | 2013 |  | 2014 |
|  | % |  | % |
Customer A |  | 36.6 |  | 31.8 |
Customer B |  | 12.4 |  | 11.6 |
Customer C |  | 13.2 |  | N/A |
Customer D |  | N/A |  | 10.7 |
Three largest receivable balances |  | 62.2 |  | 54.1 |
Movements Of Allowances For Doubtful Account [Table Text Block] |
| Details of the movements of the allowances for doubtful account are as follows:
|  | Year ended March 31, |
|  | 2012 |  | 2013 |  | 2014 |
|  | $ |  | $ |  | $ |
At beginning of year |  | - |  | - |  | 6 |
Allowance for the year |  | - |  | 6 |  | - |
At end of year |  | - |  | 6 |  | 6 |
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] |
| A substantial percentage of the Group's sales are made to three customers and are typically on an open account basis. Customers accounting for 10% or more of total net sales in any of the years ended March 31, 2012, 2013 and 2014 are as follows:
|  | Year ended March 31, |
|  | 2012 |  | 2013 |  | 2014 |
|  | % |  | % |  | % |
Customer A (note a) |  | 25.1 |  | 33.0 |  | 36.9 |
Customer B (note a) |  | N/A |  | 12.0 |  | N/A |
Customer C (note b) |  | 16.4 |  | N/A |  | N/A |
Customer D (note c) |  | N/A |  | 11.7 |  | N/A |
Customer E (note b) |  | 11.3 |  | N/A |  | N/A |
| 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.
| (c) | Sales to this customer were reported in the Metal Stamping and Mechanical OEM operating segment.

X
- Details
Name: | hiho_ConcentrationOfCreditRiskAndMajorCustomersAbstract
Namespace Prefix: | hiho_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure related to the allowance for doubtful account during the reporting period. + References No definition available. + Details
Name: | hiho_MovementsOfAllowancesForDoubtfulAccountTableTextBlock
Namespace Prefix: | hiho_
Data Type: | nonnum:textBlockItemType
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

X
- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 + Details
Name: | us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration