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Stockholders' Equity (Stock-Based Compensation) (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Stockholders' Equity [Abstract]    
Stock compensation expense $ 340,601 $ 98,481
Stock compensation expense, per share $ 0.02 $ 0.01
Unrecognized compensation costs 859,000  
Unrecognized compensation cost, recognition period 3 years  
Unrecognized compensation cost related to non-vested stock options 109,000  
Unrecognized compensation costs, amount excluded for awards that vest upon the occurrence of certain events $ 536,000