Property and Equipment (Schedule Of Depreciation And Amortization Expense) (Details) - USD ($)  | 
3 Months Ended | |
|---|---|---|
Jul. 31, 2016  | 
Jul. 31, 2015  | 
|
| Property and equipment: | ||
| Depreciation and Amortization Expense | $ 135,147 | $ 124,770 | 
| Software Amortization Expense | $ 124,180 | $ 113,832 | 
| X | ||||||||||
- Definition Amount of expense for amortization of capitalized computer software costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
| X | ||||||||||
- References No definition available. 
  |