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Net Income Per Share - (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Notes to Financial Statements    
Net income attributable to SMTP.com $ 1,069,607 $ 905,632
Basic weighted average common shares outstanding 14,412,183 13,773,566
Add incremental shares for:    
Warrants 63,840 423,085
Stock options 135,526 957,613
Diluted weighted average common shares outstanding 14,611,549 15,154,264
Net income per share:    
Basic $ 0.07 $ 0.07
Diluted $ 0.07 $ 0.06