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9. Income per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Numerator:    
Net income from continuing operations numerator for basic and diluted earnings per share $ 1,623us-gaap_NetIncomeLoss $ 1,142us-gaap_NetIncomeLoss
Denominator:    
Denominator for basic earnings per share weighted average shares 13,647,460us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 13,568,589us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Effect of dilutive securities:    
Stock Options 107,742us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants 58,676us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Denominator    
Denominator for diluted earnings per share weighted average shares 13,755,202RWC_DenominatorForDilutedEarningsPerShareWeightedAverageShares 13,627,265RWC_DenominatorForDilutedEarningsPerShareWeightedAverageShares
Basic income per share $ 0.12us-gaap_EarningsPerShareBasic $ 0.08us-gaap_EarningsPerShareBasic
Diluted income per share $ 0.12us-gaap_EarningsPerShareDiluted $ 0.08us-gaap_EarningsPerShareDiluted