Common Stock	9 Months Ended
Apr. 30, 2013
Stockholders' Equity Note [Abstract]
Common Stock	11. Common Stock Reverse Stock Split On August 13, 2012, we filed a Certificate of Amendment to our Certificate of Incorporation with the Secretary of State of the State of Delaware to effect a reverse stock split of our issued and outstanding common stock, $0.01 par value per share, at a ratio of one-for-eight. The reverse stock split was approved by stockholders holding a majority of our outstanding voting power at our annual meeting of stockholders held on July 31, 2012. The reverse stock split became effective as of the close of trading on August 14, 2012 and commenced trading on a post-reverse split basis as of the opening of trading on August 15, 2012, with each eight (8) issued and outstanding shares of our common stock automatically combined and converted into one (1) issued and outstanding share of our common stock. The reverse stock split affected all issued and outstanding shares of our common stock, as well as common stock underlying stock options, warrants, and convertible notes outstanding immediately prior to the effectiveness of the reverse stock split, but did not affect the number of authorized shares of our common stock. As a result of the reverse stock split, the number of outstanding shares of our common stock was reduced from approximately 57.8 million immediately prior to the effectiveness of the reverse stock split to approximately 7.2 million immediately thereafter. Common Stock On October 24, 2011, we entered into a one-year service agreement for investor relations services. We issued 18,750 shares of our common stock, with a value of $97,000, for these services. The value was capitalized to prepaid expenses and is being amortized over the term of the agreement. During the three months ended April 30, 2013 and 2012, we recognized zero and $24,000, respectively, of expense related to these services. During the nine months ended April 30, 2013 and 2012, we recognized $24,000 and $48,000, respectively, of expense related to these services. On September 17, 2012, we closed an underwritten public offering of an aggregate of 4,341,615 shares of our common stock, including shares issued pursuant to the exercise of the underwriter’s overallotment option, at a price to the public of $1.10 per share. The offering was made pursuant to our registration statement on Form S-3 (Registration No. 333-182475), which became effective on July 31, 2012, and a preliminary and final prospectus supplement filed with the SEC on September 4, 2012 and September 13, 2012, respectively. The shares were sold pursuant to an underwriting agreement between us and Aegis Capital Corp., which is filed as an exhibit to our Current Report on Form 8-K filed with the SEC on September 13, 2012. The gross proceeds from the offering were approximately $4,776,000 and, after deducting $549,000 for transaction costs, including discounts, commissions, and other offering expenses, such as legal and accounting fees, the net proceeds to us from the offering were approximately $4,227,000. We used $1,333,000 of the net proceeds from the offering to pay the full amount of the indebtedness we incurred in connection with the Bridge Loan, described in further detail under Note 8 above. We intend to use the remaining proceeds from the offering for working capital and general corporate purposes. On March 1, 2013, we entered into a one-year service agreement for investor relations services. We issued 250,000 shares of our common stock, with a value of $160,000, for these services. The value was capitalized to prepaid expenses and was being amortized over the term of the agreement, however, the agreement has since been terminated and, as such, the entire amount was recognized as expense during the three months ended April 30, 2013. As part of this agreement, the Company granted certain registration rights, under which the Company agreed to file a registration statement covering the resale of the shares of common stock issued in accordance with this agreement. On April 17 and April 24, 2013, we completed the initial and second closings of a private placement pursuant to which we sold an aggregate of 1,000,000 shares of our common stock and warrants to purchase an aggregate of 500,000 shares of our common stock. The shares were sold at a per share purchase price of $0.40, resulting in approximately $400,000 in aggregate proceeds to us. The warrants have a term of three years from the initial exercise date, become exercisable six months after the date of issuance, and have an exercise price of $0.65 per share. We determined that the warrants issued in connection with this private placement were equity instruments and did not represent derivative instruments. For the warrants issued in connection with the initial closing on April 17^th, a fair value of $119,000 was estimated for the warrants using the Black-Sholes valuation method using a volatility of 140.63%, an interest rate of 0.44% and a dividend yield of zero. For the warrants issued in connection with the second closing on April 24^th, a fair value of $100,000 was estimated for the warrants using the Black-Sholes valuation method using a volatility of 140.75%, an interest rate of 0.43% and a dividend yield of zero. As part of this financing, the Company granted certain registration rights, under which the Company agreed to file a registration statement covering the resale of the shares of common stock sold in this financing, as well as those shares issuable upon exercise of the warrant. The shares of common stock issued under the services agreement and in the private placement and the warrant issued in the private placement were offered and sold without registration under the Securities Act of 1933, as amended (the “Securities Act”), or state securities laws, in reliance on the exemptions provided by Section 4(2) of the Securities Act and Regulation D promulgated thereunder and in reliance on similar exemptions under applicable state laws, based on the lack of any general solicitation or advertising in connection with the sale of the securities; the representation of each investor to the Company that it is an accredited investor (as that term is defined in Rule 501 of Regulation D) and that it is purchasing the securities for its own account and without a view to distribute them. The securities may not be offered or sold in the United States without an effective registration statement or pursuant to an exemption from applicable registration requirements.

Common Stock

9 Months Ended

Apr. 30, 2013

Stockholders' Equity Note [Abstract]

11. Common Stock

Reverse Stock Split

On August 13, 2012, we filed a Certificate of Amendment to our Certificate of Incorporation with the Secretary of State of the State of Delaware to effect a reverse stock split of our issued and outstanding common stock, $0.01 par value per share, at a ratio of one-for-eight. The reverse stock split was approved by stockholders holding a majority of our outstanding voting power at our annual meeting of stockholders held on July 31, 2012. The reverse stock split became effective as of the close of trading on August 14, 2012 and commenced trading on a post-reverse split basis as of the opening of trading on August 15, 2012, with each eight (8) issued and outstanding shares of our common stock automatically combined and converted into one (1) issued and outstanding share of our common stock. The reverse stock split affected all issued and outstanding shares of our common stock, as well as common stock underlying stock options, warrants, and convertible notes outstanding immediately prior to the effectiveness of the reverse stock split, but did not affect the number of authorized shares of our common stock. As a result of the reverse stock split, the number of outstanding shares of our common stock was reduced from approximately 57.8 million immediately prior to the effectiveness of the reverse stock split to approximately 7.2 million immediately thereafter.

Common Stock

On October 24, 2011, we entered into a one-year service agreement for investor relations services. We issued 18,750 shares of our common stock, with a value of $97,000, for these services. The value was capitalized to prepaid expenses and is being amortized over the term of the agreement. During the three months ended April 30, 2013 and 2012, we recognized zero and $24,000, respectively, of expense related to these services. During the nine months ended April 30, 2013 and 2012, we recognized $24,000 and $48,000, respectively, of expense related to these services.

On September 17, 2012, we closed an underwritten public offering of an aggregate of 4,341,615 shares of our common stock, including shares issued pursuant to the exercise of the underwriter’s overallotment option, at a price to the public of $1.10 per share. The offering was made pursuant to our registration statement on Form S-3 (Registration No. 333-182475), which became effective on July 31, 2012, and a preliminary and final prospectus supplement filed with the SEC on September 4, 2012 and September 13, 2012, respectively. The shares were sold pursuant to an underwriting agreement between us and Aegis Capital Corp., which is filed as an exhibit to our Current Report on Form 8-K filed with the SEC on September 13, 2012. The gross proceeds from the offering were approximately $4,776,000 and, after deducting $549,000 for transaction costs, including discounts, commissions, and other offering expenses, such as legal and accounting fees, the net proceeds to us from the offering were approximately $4,227,000. We used $1,333,000 of the net proceeds from the offering to pay the full amount of the indebtedness we incurred in connection with the Bridge Loan, described in further detail under Note 8 above. We intend to use the remaining proceeds from the offering for working capital and general corporate purposes.

On March 1, 2013, we entered into a one-year service agreement for investor relations services. We issued 250,000 shares of our common stock, with a value of $160,000, for these services. The value was capitalized to prepaid expenses and was being amortized over the term of the agreement, however, the agreement has since been terminated and, as such, the entire amount was recognized as expense during the three months ended April 30, 2013. As part of this agreement, the Company granted certain registration rights, under which the Company agreed to file a registration statement covering the resale of the shares of common stock issued in accordance with this agreement.

On April 17 and April 24, 2013, we completed the initial and second closings of a private placement pursuant to which we sold an aggregate of 1,000,000 shares of our common stock and warrants to purchase an aggregate of 500,000 shares of our common stock. The shares were sold at a per share purchase price of $0.40, resulting in approximately $400,000 in aggregate proceeds to us. The warrants have a term of three years from the initial exercise date, become exercisable six months after the date of issuance, and have an exercise price of $0.65 per share. We determined that the warrants issued in connection with this private placement were equity instruments and did not represent derivative instruments. For the warrants issued in connection with the initial closing on April 17^th, a fair value of $119,000 was estimated for the warrants using the Black-Sholes valuation method using a volatility of 140.63%, an interest rate of 0.44% and a dividend yield of zero. For the warrants issued in connection with the second closing on April 24^th, a fair value of $100,000 was estimated for the warrants using the Black-Sholes valuation method using a volatility of 140.75%, an interest rate of 0.43% and a dividend yield of zero. As part of this financing, the Company granted certain registration rights, under which the Company agreed to file a registration statement covering the resale of the shares of common stock sold in this financing, as well as those shares issuable upon exercise of the warrant.

The shares of common stock issued under the services agreement and in the private placement and the warrant issued in the private placement were offered and sold without registration under the Securities Act of 1933, as amended (the “Securities Act”), or state securities laws, in reliance on the exemptions provided by Section 4(2) of the Securities Act and Regulation D promulgated thereunder and in reliance on similar exemptions under applicable state laws, based on the lack of any general solicitation or advertising in connection with the sale of the securities; the representation of each investor to the Company that it is an accredited investor (as that term is defined in Rule 501 of Regulation D) and that it is purchasing the securities for its own account and without a view to distribute them. The securities may not be offered or sold in the United States without an effective registration statement or pursuant to an exemption from applicable registration requirements.