| 
           Courseware (Schedule of Courseware, Net) (Details) (USD $) 
         | 
        
           Jan. 31, 2014 
         | 
        
           Apr. 30, 2013 
         | 
      
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Total | $ 129,367 | $ 208,095 | 
| 
           Courseware [Member] 
         | 
        ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Courseware | 2,102,037 | 2,097,538 | 
| Accumulated amortization | (1,972,670) | (1,889,443) | 
| Total | $ 129,367 | $ 208,095 | 
| X | ||||||||||
| 
             
- Definition 
          Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |