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Commitments and Contingencies - Derivative Litigation (Details)	7 Months Ended
	Aug. 31, 2015 lawsuit
Commitments and Contingencies
Number of law suits filed	2

X

- Definition

The number of law suits filed during the period.

+ References

No definition available.

+ Details

Name:	hngr_LossContingencyNumberOfLawSuitsFiled
Namespace Prefix:	hngr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration