RISK MANAGEMENT (Details) - Rockwell Transportation, Inc	Dec. 31, 2015 USD ($)
Risk management
Self insurance retention per occurrence	$ 350,000
Aggregate coverage	630,370
Retention limit in excess of claims paid and accrued	630,000
Estimated additional future claims	127,349
Cash collateral and escrow held by insurance carrier for workers' compensation insurance	$ 400,000

Represents the amount held in cash collateral and escrow by the insurance carrier for workers' compensation insurance.

No definition available.

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Namespace Prefix:	rmti_
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Balance Type:	debit
Period Type:	instant

- Definition

Represents the estimated additional future claims subject to payment by the entity, for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

No definition available.

+ Details

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Namespace Prefix:	rmti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of self insurance retention per occurrence as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

No definition available.

+ Details

Name:	rmti_SelfInsuranceReservePerOccurrence
Namespace Prefix:	rmti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount by which self insurance retention limit is in excess of claims paid and accrued.

+ References

No definition available.

+ Details

Name:	rmti_SelfInsuranceRetentionLimitsInExcessOfClaimsPaidAndAccrued
Namespace Prefix:	rmti_
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_LossContingenciesLineItems
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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	dei_LegalEntityAxis=rmti_RockwellTransportationIncMember
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