Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Mar. 12, 2013	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Mar. 12, 2013
Equity [Line Items]
Issuance of common stock to Steel Partners Holdings, L.P., shares	7,500,000
Issuance of common stock to Steel Partners Holdings, L.P., price per share					$ 4.00
Proceeds from issuance of common stock, gross	$ 30,000,000
Common stock issuance, transaction cost	2,300,000		2,325,000
Net proceeds from issuance of common stock	$ 27,700,000	$ 1,368,000		$ 91,000
Issuance of warrants to acquire additional shares, shares	2,000,000
Issuance of warrants to acquire additional shares, exercise price					$ 5.00
Common stock equity distribution agreement		The Company is required to keep the resale registration statement effective for three years following the date it is declared effective. Steel Partners also has the right, until such time as it owns less than one-third of the common stock originally issued to it under the investment agreement, to require that the Company file a prospectus supplement or amendment to cover sales of common stock through a firm commitment underwritten public offering.