Note 25 - Shares to be Issued and Merger Reserve (Details Textual)	Mar. 31, 2018
Statement Line Items [Line Items]
Merger reserve minimum consideration required	90.00%

The percentage of merger reserve minimum consideration required.

No definition available.

Name:	rhyth_MergerReserveMinimumConsiderationRequired
Namespace Prefix:	rhyth_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant