Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Stock Options) (Details)

v2.4.0.6
Stock-Based Compensation (Stock Options) (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Number of Options  
Outstanding at beginning of period 3,412,777
Granted 1,585,225
Exercised (60,000)
Forfeited (45,000)
Expired   
Outstanding at end of period 4,893,002
Exercisable at end of period 2,022,640
Weighted Average Exercise Price  
Outstanding at beginning of period $ 2.01
Granted $ 3.07
Exercised $ 0.84
Forfeited $ 2.62
Expired   
Outstanding at end of period $ 2.35
Exercisable at end of period $ 1.36
Weighted Average Remaining Contractual Life (years)  
Outstanding at end of period 7 years 8 months 12 days
Exercisable at end of period 5 years 2 months 12 days
Aggregate Intrinsic Value  
Outstanding at end of period $ 3,158,458
Exercisable at end of period $ 2,964,259