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Note I - Stock Option Plan Comparison (Details) - Jul. 31, 2015 - shares
Total
The 1997 Plan [Member]  
Minimum exercise price as a percentage of fair market value at date of grant 100.00%
Last expiration date for outstanding options Jul. 02, 2017
Shares available for grant at July 31, 2015 (in shares) 0
The 2007 Plan [Member]  
Minimum exercise price as a percentage of fair market value at date of grant 100.00%
Last expiration date for outstanding options May 20, 2025
Shares available for grant at July 31, 2015 (in shares) 80,750