XML 68 R54.htm IDEA: XBRL DOCUMENT v3.19.2

Inventories, Net (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Inventories, Net (Textual)
Slow moving inventories	$ 419	$ 45	$ 41

X

- References

No definition available.

+ Details

Name:	hiho_InventoriesNetTextualAbstract
Namespace Prefix:	hiho_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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