Stock-Based Compensation (Details) (Textual) (USD $)	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Stock Based Compensation (Textual) [Abstract]
Equity Incentive Plans	12,773	14,716
Stock compensation	$ 7,000	$ 45,000
Number of equity incentive plans granted
Stock Based Compensation (Additional Textual) [Abstract]
Fair market value of the stock at the date of grant	not less than 85% of the fair market value of the stock at the date of grant
Compensation expense related to treasury stock issued to employees		36,000
Aggregate intrinsic value	0
Stock Options [Member]
Stock Based Compensation (Textual) [Abstract]
Unrecognized cost of nonvested option	0
Equity Incentive Plan 1997 [Member]
Stock Based Compensation (Textual) [Abstract]
Number of equity incentive plans granted	0	0
Equity Incentive Plan 1999 [Member]
Stock Based Compensation (Textual) [Abstract]
Equity Incentive Plans	400,000
Number of equity incentive plans granted	0	0
Equity Incentive Plan 2001 [Member]
Stock Based Compensation (Textual) [Abstract]
Equity Incentive Plans	100,000
Number of shares issued under 1999 equity incentive plan	0	0
Employee Stock Purchase Plan [Member]
Stock Based Compensation (Textual) [Abstract]
Equity Incentive Plans	50,000
Stock compensation	$ 7,000	$ 8,000
Employee Stock Purchase Amended Plan [Member]
Stock Based Compensation (Textual) [Abstract]
Equity Incentive Plans	200,000
Minimum [Member]
Stock Based Compensation (Textual) [Abstract]
Stock bonuses and restricted stock purchase agreements	85.00%
Minimum [Member] | Stock Options [Member]
Stock Based Compensation (Textual) [Abstract]
Options vest period	4 years
Maximum [Member] | Stock Options [Member]
Stock Based Compensation (Textual) [Abstract]
Options vest period	10 years