Related Parties - Additional Information (Detail) (USD $)	3 Months Ended		3 Months Ended		3 Months Ended
	Oct. 31, 2013	Jul. 31, 2013	Oct. 31, 2013 Put Option [Member]	Oct. 31, 2013 Subsidiaries [Member]	Oct. 31, 2013 Symbio Investment Corporation [Member]	Aug. 27, 2007 Symbio Investment Corporation [Member]	Aug. 01, 2007 Symbio Investment Corporation [Member]
Percentage of ownership investment				20.00%
Strategic Investment in Symbio						$ 400,000	$ 500,000
Strategic Investment in Symbio, Shares						200,000	250,000
Percentage of shares						4.00%
Expiration Date of put option			Jan. 01, 2015
Selling of shares through put option to David lee			200,000
Price per share			$ 2.00
Sale of shares without exercise of the put option	200,000
Compensation for Mr. Lee's services					45,000
Increase in investments and a capital contribution by David Lee					90,000
Payments to David Lee of the proceeds	1,000,000
Additional payments to David Lee	50.00%
Impairment of investment	394,000
Investments	$ 596,000	$ 990,000