Stock Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Stock issued during period, shares, employee stock purchase plans	13,939
Number of equity incentive plans granted	0
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
Aggregate intrinsic value	$ 0
Sharebased compensation shares authorized under stock purchase plans exercise price	$ 0.80
Employee Stock Option [Member]
Unrecognized cost of nonvested option	0
Equity Incentive Plan 1997 [Member]
Number of equity incentive plans granted	0
Equity Incentive Plan 1999 [Member]
Number of equity incentive plans granted	0
Equity Incentive Plan 2001 [Member]
Number of shares issued under 1999 equity incentive plan	0
Employee Stock Purchase Plan [Member]
Equity Incentive Plans	200,000
Stock compensation	$ 341	$ 0
Minimum [Member]
Stock bonuses and restricted stock purchase agreements	85.00%
Minimum [Member] | Employee Stock Option [Member]
Options vest period	4 years
Maximum [Member] | Employee Stock Option [Member]
Options vest period	10 years