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Changes of deferred income tax assets and liability (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Changes of deferred income tax assets and liability    
Allowance for doubtful trade receivables deferred tax $ 5,002,516fil_AllowanceForDoubtfulTradeReceivablesDeferredTax $ 1,995,243fil_AllowanceForDoubtfulTradeReceivablesDeferredTax
Allowance for doubtful other receivables deferred tax 9,049fil_AllowanceForDoubtfulOtherReceivablesDeferredTax 6,460fil_AllowanceForDoubtfulOtherReceivablesDeferredTax
Inventory obsolescence reserve 1,040,107fil_Inventoryobsolescencereserve11 1,501,687fil_Inventoryobsolescencereserve11
Expenses not deductible in current year 31,000fil_ExpensesNotDeductibleInCurrentYear 31,143fil_ExpensesNotDeductibleInCurrentYear
PRC Net operating loss carry forward 1,688,417fil_PrcNetOperatingLossCarryForward 328,643fil_PrcNetOperatingLossCarryForward
U.S. net operating loss carry forwards 1,181,679fil_USNetOperatingLossCarryForwards 1,052,784fil_USNetOperatingLossCarryForwards
Total deferred income tax assets 8,952,768fil_TotalDeferredIncomeTaxAssets 4,915,960fil_TotalDeferredIncomeTaxAssets
Valuation allowance, (8,952,768)fil_ValuationAllowance (4,915,960)fil_ValuationAllowance
Net deferred income tax asset.   0fil_NetDeferredIncomeTaxAsset
Intangible assets income tax liability $ 252,707fil_IntangibleAssetsIncomeTaxLiability $ 176,414fil_IntangibleAssetsIncomeTaxLiability