Share-Based Compensation (Tables)

3 Months Ended

Oct. 31, 2012

Share-based Compensation [Abstract]

Schedule of Share-based Compensation, Activity

	For the three months ended October 31,
	2012		2011
Share-based compensation for employees and directors:
Selling, general and administrative	$	141,000	$	322,000
Research and development		46,000		63,000
		187,000		385,000
Share-based compensation for consultants:
Selling, general and administrative		0		(8,000)
Research and development		1,000		0
		1,000		(8,000)
Total share-based compensation expense	$	188,000	$	377,000

Schedule of Other Share-based Compensation, Activity

	For the three months ended October 31,
	2012	2011
Volatility	0.00%	81.55% - 81.56%
Risk-free interest rate	0.00%	0.97% - 1.32%
Dividend yield	0	0.0%
Expected life	0	5.05 years