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SIGNIFICANT MARKET SEGMENTS (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
SIGNIFICANT MARKET SEGMENTS      
Number of operating market segment 1us-gaap_NumberOfOperatingSegments    
Significant market segments      
Accounts receivable 4,472,002us-gaap_AccountsReceivableNetCurrent 4,578,319us-gaap_AccountsReceivableNetCurrent  
Assets 97,999,716us-gaap_Assets 36,362,124us-gaap_Assets  
Outside United States      
Significant market segments      
Assets 0us-gaap_Assets
/ us-gaap_StatementGeographicalAxis
= rmti_InternationalMember
   
Sales | Total international sales, including sales to domestic distributors      
Significant market segments      
Concentration risk (as a percent) 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ rmti_CustomersAndDistributorsAxis
= rmti_InternationalSalesIncludingSalesToDomesticDistributorsMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ rmti_CustomersAndDistributorsAxis
= rmti_InternationalSalesIncludingSalesToDomesticDistributorsMember
11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ rmti_CustomersAndDistributorsAxis
= rmti_InternationalSalesIncludingSalesToDomesticDistributorsMember
Sales | Customer concentration      
Significant market segments      
Customers accounted for more than 10% of sales 0rmti_NumberOfCustomersIndividuallyExceedingTenPercentOfSales
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
0rmti_NumberOfCustomersIndividuallyExceedingTenPercentOfSales
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
0rmti_NumberOfCustomersIndividuallyExceedingTenPercentOfSales
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
Sales | Customer concentration | Foreign customers and distributors | Maximum      
Significant market segments      
Concentration risk (as a percent) 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ rmti_CustomersAndDistributorsAxis
= rmti_ForeignCustomersAndDistributorsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ rmti_CustomersAndDistributorsAxis
= rmti_ForeignCustomersAndDistributorsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ rmti_CustomersAndDistributorsAxis
= rmti_ForeignCustomersAndDistributorsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
DaVita Healthcare Partners, Inc. | Customer concentration      
Significant market segments      
Number of customers 1rmti_ConcentrationRiskNumberOfCustomers
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= rmti_DaVitaHealthcarePartnersIncMember
   
Accounts receivable 2,041,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= rmti_DaVitaHealthcarePartnersIncMember
1,886,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= rmti_DaVitaHealthcarePartnersIncMember
 
DaVita Healthcare Partners, Inc. | Sales | Customer concentration      
Significant market segments      
Concentration risk (as a percent) 49.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= rmti_DaVitaHealthcarePartnersIncMember
49.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= rmti_DaVitaHealthcarePartnersIncMember
49.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= rmti_DaVitaHealthcarePartnersIncMember