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Organization and Summary of Significant Accounting Policies (Details 2) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Reconciliation of basic and diluted net income per share    
Net income available to common stockholders for basic and diluted net income per share of common stock $ 1,242,434us-gaap_ProfitLoss $ 2,396,358us-gaap_ProfitLoss
Weighted average common stock outstanding - basic and diluted 3,934,653us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 3,503,502us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Net income per common share - basic and diluted $ 0.32us-gaap_EarningsPerShareBasicAndDiluted $ 0.68us-gaap_EarningsPerShareBasicAndDiluted