Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Earnings Per Share (Details)

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Summary of Significant Accounting Policies - Earnings Per Share (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Accounting Policies [Abstract]    
Basic and diluted net (loss) income $ (1,924,072) $ 1,735,164
Basic weighted-average shares outstanding 45,327,237 44,145,093
Effect of dilutive securities:    
Preferred stock (in shares) 0 0
Stock options (in shares) 893,511 1,983,324
Diluted weighted-average shares outstanding 46,220,748 46,128,417
Securities excluded from computation of earnings per share 1,516,676 88,688