Annual report pursuant to Section 13 and 15(d)

Business and summary of significant accounting policies (Details)

v2.4.1.9
Business and summary of significant accounting policies (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Foreign currency transaction gains (losses) $ (280,098)us-gaap_ForeignCurrencyTransactionGainLossRealized $ 61,000us-gaap_ForeignCurrencyTransactionGainLossRealized
Change in valuation allowance (3,061,841)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 10,249,612us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Advertising expense $ 1,700,000us-gaap_AdvertisingExpense $ 1,500,000us-gaap_AdvertisingExpense