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Pension Plans (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Compensation And Retirement Disclosure [Abstract]    
Employment benefits   $ 203,111us-gaap_PaymentsForPostemploymentBenefits
Number of years in providing benefits   5 years
Commitment expenses $ 51,000us-gaap_PensionExpense $ 17,000us-gaap_PensionExpense