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Income Taxes (Details Textual) (USD $)
 1 Months Ended 12 Months Ended
Jun. 30, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes (Textual) [Abstract]        
Income tax benefit   $ 80,000 $ 78,000 $ 155,000
Additional income tax provision 800,000      
Decreases in basic net income per share     $ 0.04  
Decreases in diluted net income per share     $ 0.03  
Current period excess stock-based compensation tax deduction   1,300,000 600,000 900,000
Unrecognized federal and state tax benefits resulting from the exercise of NSOs   0 0  
Net unrecognized tax benefits   461,000 455,000 400,000
Interest and penalties associated with unrecognized tax benefits   42,000 104,000 150,000
Interest and penalties accrued   213,000 215,000  
State and Local Jurisdiction [Member]
        
Operating Loss Carryforwards [Line Items]        
State NOL carryforwards   200,000 700,000 2,200,000
Remaining state tax NOL carryforwards   8,000,000    
Portion of state NOL carryforwards, not able to be utilized before expiration   6,900,000 6,100,000 7,100,000
Federal benefit   $ 300,000 $ 300,000 $ 400,000