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CONCENTRATIONS OF CREDIT RISK AND MAJOR CUSTOMERS (DETAILS)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Loans Receivable Percentage	62.20%	81.30%
Accounts Receivable [Member]
Loans Receivable Percentage	100.00%
Accounts Receivable [Member] | Customer A [Member]
Loans Receivable Percentage	36.60%	19.60%
Accounts Receivable [Member] | Customer B [Member]
Loans Receivable Percentage	12.40%	44.40%
Accounts Receivable [Member] | Customer C [Member]
Loans Receivable Percentage	13.20%	17.30%

X

- Definition

Percentage of loans receivable during the period.

+ References

No definition available.

+ Details

Name:	hiho_LoansReceivablePercentage
Namespace Prefix:	hiho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration