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Restricted Cash - Additional Information (Detail) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Cash and Cash Equivalents [Abstract]    
Restricted cash $ 8,414,000us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue $ 10,055,000us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Restricted cash amount related to securing maximum exposure generated by automated clearinghouse transactions 600,000cmls_RestrictedCashBalanceRelatesToCompanysBankAccounts 600,000cmls_RestrictedCashBalanceRelatesToCompanysBankAccounts
Cash reserve from acquisition $ 7,800,000cmls_RestrictedCashReserveFromAcquisition $ 9,500,000cmls_RestrictedCashReserveFromAcquisition