Revenue Recognition - Nature of goods and services (Details)	9 Months Ended
Sep. 30, 2019 agreement
Revenue Recognition
Number of distribution and license agreements	2

Represents the number of distribution and license agreements.

No definition available.

Name:	rmti_NumberOfDistributionAndLicenseAgreements
Namespace Prefix:	rmti_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration