Annual report pursuant to Section 13 and 15(d)

Income taxes (Schedule of Income (Loss) Before Taxes from Continuing Operations) (Details)

v2.4.1.9
Income taxes (Schedule of Income (Loss) Before Taxes from Continuing Operations) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]    
Domestic $ 6,128,992us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ (16,323,206)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign 1,220,924us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 1,101,614us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Total $ 7,349,916us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ (15,221,592)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments