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