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Sales Concentration	12 Months Ended
Sales Concentration	Jul. 31, 2015
Sales Concentration [Abstract]
Sales Concentration	11. Sales Concentration Net product sales were $729,000 and $550,000 for the years ended July 31, 2015 and 2014, respectively. For the year ended July 31, 2015, one customer accounted for 47% of our net product sales. No other individual customer accounted for 10% or more of our net product sales. The geographic breakdown of net product sales was as follows: 97% U.S. and 3% foreign. For the year ended July 31, 2014, two customers accounted for 66% of our net product sales. No other individual customer accounted for 10% or more of our net product sales. The geographic breakdown of net product sales was as follows: 100% U.S.