Description of Business (Details)	9 Months Ended
Sep. 30, 2018
Description of Business
Percentage of supply in domestic market	25

Represents the percentage of supply in domestic market.

No definition available.

Name:	rmti_PercentageOfSupplyInDomesticMarket
Namespace Prefix:	rmti_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration