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Borrowing Arrangements (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Borrowing Arrangements (Additional Textual) [Abstract]  
Line of credit available for general working capital needs $ 5,000,000us-gaap_LineOfCreditFacilityCapacityAvailableForTradePurchases
Letter of credit sub-facility 5,000,000mcrl_LetterOfCreditSubFacility
Foreign exchange sub-facility 2,000,000mcrl_LineOfCreditForeignExchangeSubFacility
Line of Credit Facility, Interest Rate Description Interest rates under the facility are based on one of three interest rates, at the Company’s option: (1) a variable alternate base rate plus 1.0%, the alternate base rate being the greater of (x) Bank of the West’s prime rate, (y) the Fed Funds Rate plus 0.5% or (z) daily adjusted one-month LIBOR plus 1.0%; (2) floating one-month LIBOR plus 2.0% or (3) fixed LIBOR for one, two, three or six month periods, plus 2.0%.
Amount outstanding on the line of credit 0us-gaap_LineOfCredit
Letter of Credit [Member]  
Borrowing Arrangements (Additional Textual) [Abstract]  
Letters of credit, outstanding $ 300,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_LetterOfCreditMember