XML 40 R5.htm IDEA: XBRL DOCUMENT v2.4.0.8

Condensed Statements of Operations (Parenthetical)	Sep. 30, 2014
Common Stock Subject to Forfeiture	375,000

X

- Definition

Common stock subject to forfeiture.

+ References

No definition available.

+ Details

Name:	hdrau_CommonStockSubjectToForfeiture
Namespace Prefix:	hdrau_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant