Represents the initial term set for the Exclusive Distribution Agreement.

No definition available.

Name:	rmti_DistributionAgreementTerm
Namespace Prefix:	rmti_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total carrying amount as of the balance sheet date of unearned revenue or income, not otherwise specified in the taxonomy, which is expected to be taken into income in future periods and obligations not separately disclosed in the balance sheet (other liabilities).

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCreditsAndOtherLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=rmti_BaxterHealthcareOrganizationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=rmti_UpfrontFeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Distribution Agreement (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Distribution Agreement (Details) - USD ($) $ in Millions	Oct. 31, 2014	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Recognized revenue		$ 2.5	$ 1.9
Baxter
Related Party Transaction [Line Items]
Distribution agreement term	10 years
Upfront fee	$ 20.0
Baxter \| Upfront Fee
Related Party Transaction [Line Items]
Recognized revenue		$ 2.5	$ 1.9