XML 170 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.8

INVENTORIES (DETAILS TEXTUAL) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
Inventory [Line Items] |  |  |
Slow Moving Inventories | $ 125 | $ 56 | $ 199

X
- Definition slow moving inventories during the period. + References No definition available. + Details
Name: | hiho_SlowMovingInventories
Namespace Prefix: | hiho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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