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Other Income (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Details    
Interest income $ 25,904us-gaap_InvestmentIncomeInterest $ 30,802us-gaap_InvestmentIncomeInterest
Gain on sale of equipment 15,659us-gaap_GainLossOnDispositionOfAssets 114,658us-gaap_GainLossOnDispositionOfAssets
Other nonoperating income 15,376us-gaap_OtherNonoperatingIncome 15,375us-gaap_OtherNonoperatingIncome
Other income $ 56,939us-gaap_OtherNonoperatingIncomeExpense $ 160,835us-gaap_OtherNonoperatingIncomeExpense