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Stockholders' Equity (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Shares Exercisable, beginning of period (in shares) 86,625 110,625
Shares, Vested (in shares) 12,250 22,250
Shares, Exercised (in shares) (49,000) (4,000)
Shares, Cancelled (in shares) (2,875) (42,250)
Shares Exercisable at the end of period (in shares) 47,000 86,625
Weighted Average Exercise Price, Exercisable, beginning of period (in dollars per share) $ 2.61 $ 3.36
Weighted Average Exercise Price, Vested (in dollars per share) $ 5.97 $ 2.97
Weighted Average Exercise Price, Exercised (in dollars per share) $ 1.94 $ 2.49
Weighted Average Exercise Price, Cancelled (in dollars per share) $ 5.10 $ 4.78
Weighted Average Exercise Price, Exercisable at the end of period (in dollars per share) $ 4.03 $ 2.61
Shares Outstanding, beginning of period (in shares) 162,500 202,750
Shares, Granted (in shares) 109,000 8,000
Shares Exercised (in shares) (49,000) (4,000)
Shares Cancelled (in shares) (4,000) (44,250)
Shares Outstanding at the end of period (in shares) 218,500 162,500
Weighted Average Exercise Price, Outstanding, beginning of period (in dollars per share) $ 4.25 $ 4.28
Weighted Average Exercise Price, Granted (in dollars per share) $ 5.17 $ 5.96
Weighted Average Exercise Price, Exercised (in dollars per share) $ 1.94 $ 2.49
Weighted Average Exercise Price, Cancelled (in dollars per share) $ 5.35 $ 4.84
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share) $ 5.21 $ 4.25