Summary of Significant Accounting Policies (Details 2) (Subsequent Event [Member])	0 Months Ended
Apr. 24, 2014
Subsequent Event [Member]
Class of Stock [Line Items]
Reverse stock split ratio	2.28

Represents the ratio applied to the conversion of reverse stock split.

No definition available.

Name:	radh_StockholdersEquityNoteReverseStockSplitConversionRatio
Namespace Prefix:	radh_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration