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Accounts Payable and Accrued Liabilities (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]    
Accounts payable $ 2,707,437us-gaap_AccountsPayableCurrent $ 2,296,645us-gaap_AccountsPayableCurrent
Accrued expenses 3,092,030us-gaap_AccruedLiabilitiesCurrent 3,125,023us-gaap_AccruedLiabilitiesCurrent
Accrued bonuses 240,689us-gaap_AccruedBonusesCurrent 964,189us-gaap_AccruedBonusesCurrent
Other accrued liabilities 282,251us-gaap_OtherAccruedLiabilitiesCurrent 417,316us-gaap_OtherAccruedLiabilitiesCurrent
Accounts payable and accrued liabilities $ 6,322,407us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent $ 6,803,173us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent