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Significant Accounting Policies (Details Textual) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Significant Accounting Policies (Textual)      
Percentage of tuition revenue in total revenue 96.00%    
Tuition receivable included in other assets $ 2,400,000   $ 3,400,000
Goodwill and intangible assets impairment $ 0    
Common stock, shares authorized 20,000,000   20,000,000
Common stock, par value $ 0.01   $ 0.01
Common stock, shares issued 10,843,301   10,797,464
Common stock, shares outstanding 10,843,301   10,797,464
Preferred stock, shares authorized      8,000,000
Preferred stock, shares issued       
Preferred stock, shares outstanding       
Issued and outstanding of stock options