CAPITAL STOCK	9 Months Ended
Jun. 30, 2017
Stockholders' Equity Note [Abstract]
CAPITAL STOCK	NOTE E — CAPITAL STOCK On November 2, 2016, the Company entered into a securities purchase agreement with an institutional investor providing for the purchase of $5 million of common stock and warrants at a combined price of $2.20 per share of common stock and warrant (the “Private Placement”). In the Private Placement, the Company sold 2,272,727 shares of its common stock and warrants to purchase 2,272,727 shares of its common stock. The warrants have the same terms as the Company's existing publicly traded warrants (APDNW) with an exercise price of $3.50 per share and an expiration date of November 20, 2019. The offering closed on November 7, 2016. The Company agreed to file a registration statement providing for the resale of these securities on Form S-3 by December 7, 2016. On December 6, 2016, the Company filed the Form S-3, which was declared effective by the SEC on December 13, 2016. Upon effectiveness of the registration statement, the common stock and warrants issued in the Private Placement became freely tradeable on The NASDAQ Capital Market under the symbols "APDN" and "APDNW", respectively. The aggregate gross proceeds to the Company from the Private Placement were $5 million before deducting the placement agents' fee and other offering expenses. As a result of the placement agents’ fee and other offering expenses attributable to the Private Placement, the net proceeds were $4,319,861. In connection with the closing of this Private Placement, as partial compensation, on November 7, 2016, the Company granted warrants to purchase an aggregate of 68,182 shares of its common stock to the Company's placement agents, Maxim Group LLC and Imperial Capital LLC (the “Placement Agent Warrants”) at an exercise price of $2.53 (115% of the public offering price), subject to adjustment as set forth therein (including for stock dividends and splits and certain other distributions and “Fundamental Transactions,” as defined therein). The Placement Agent Warrants will be exercisable beginning six months following the closing date of the Private Placement and terminate at 5:00 P.M. (Eastern Standard Time) on November 7, 2021. In addition, the Placement Agent Warrants provide for cashless exercise, which the Placement Agents may elect if there is no effective registration statement registering the resale of the shares issuable upon exercise of the Placement Agent Warrants. The number of shares of common stock that may be acquired by the Placement Agents upon any exercise of the Placement Agent Warrants (or otherwise in respect hereof) shall be limited to the extent necessary to insure that, following such exercise, the total number of shares of common stock then beneficially owned by the Placement Agent and its Affiliates (as defined therein) and any other Persons whose beneficial ownership of common stock would be aggregated with the Placement Agent pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”), does not exceed 9.99% of the total number of issued and outstanding shares of common stock. On June 28, 2017 the Company entered into subscription agreements for a private placement of its common stock,with a group of investors, including a strategic investor which is also a key customer and intellectual property licensee of the Company as well as all of the Company’s executive officers and all members of the Board of Directors. As a result of the private placement, the Company agreed to issue 1,025,574 shares of common stock at a price of $1.76 per share for total gross proceeds of $1,805,000. As part of the private placement, the Company’s management and Board of Directors purchased 315,346 shares of common stock for gross proceeds of $555,000. Included in the aggregate proceeds was $1,505,000 in stock subscriptions receivable as of June 30, 2017. Proceeds of $505,000 related to the stock subscriptions receivable were received from July 1, 2017 through the date of filing of this Form 10-Q, and therefore were reflected as an asset in the condensed consolidated balance sheet. The Company agreed to extend the payment term of $1,000,000 with respect to one investor for an additional 30 days to August 28, 2017, and therefore this amount is reflected as a reduction of stockholders’ equity in the condensed consolidated balance sheet. The issuance of the Common Stock was exempt from the registration requirements of the Securities Act of 1933 pursuant to Section 4(a)(2) of such Securities Act and Regulation D promulgated thereunder and such Common Stock will therefore be restricted. Each investor gave representations that he, she or it was an “accredited investor” (as defined under Rule 501 of Regulation D) and that he, she or it is purchasing such securities without a present view toward a distribution of the securities. In addition, there was no general solicitation conducted in connection with the offer and sale of the securities.

CAPITAL STOCK

9 Months Ended

Jun. 30, 2017

Stockholders' Equity Note [Abstract]

NOTE E — CAPITAL STOCK

On November 2, 2016, the Company entered into a securities purchase agreement with an institutional investor providing for the purchase of $5 million of common stock and warrants at a combined price of $2.20 per share of common stock and warrant (the “Private Placement”). In the Private Placement, the Company sold 2,272,727 shares of its common stock and warrants to purchase 2,272,727 shares of its common stock. The warrants have the same terms as the Company's existing publicly traded warrants (APDNW) with an exercise price of $3.50 per share and an expiration date of November 20, 2019. The offering closed on November 7, 2016.

The Company agreed to file a registration statement providing for the resale of these securities on Form S-3 by December 7, 2016. On December 6, 2016, the Company filed the Form S-3, which was declared effective by the SEC on December 13, 2016. Upon effectiveness of the registration statement, the common stock and warrants issued in the Private Placement became freely tradeable on The NASDAQ Capital Market under the symbols "APDN" and "APDNW", respectively.

The aggregate gross proceeds to the Company from the Private Placement were $5 million before deducting the placement agents' fee and other offering expenses. As a result of the placement agents’ fee and other offering expenses attributable to the Private Placement, the net proceeds were $4,319,861.

In connection with the closing of this Private Placement, as partial compensation, on November 7, 2016, the Company granted warrants to purchase an aggregate of 68,182 shares of its common stock to the Company's placement agents, Maxim Group LLC and Imperial Capital LLC (the “Placement Agent Warrants”) at an exercise price of $2.53 (115% of the public offering price), subject to adjustment as set forth therein (including for stock dividends and splits and certain other distributions and “Fundamental Transactions,” as defined therein). The Placement Agent Warrants will be exercisable beginning six months following the closing date of the Private Placement and terminate at 5:00 P.M. (Eastern Standard Time) on November 7, 2021. In addition, the Placement Agent Warrants provide for cashless exercise, which the Placement Agents may elect if there is no effective registration statement registering the resale of the shares issuable upon exercise of the Placement Agent Warrants. The number of shares of common stock that may be acquired by the Placement Agents upon any exercise of the Placement Agent Warrants (or otherwise in respect hereof) shall be limited to the extent necessary to insure that, following such exercise, the total number of shares of common stock then beneficially owned by the Placement Agent and its Affiliates (as defined therein) and any other Persons whose beneficial ownership of common stock would be aggregated with the Placement Agent pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”), does not exceed 9.99% of the total number of issued and outstanding shares of common stock.

On June 28, 2017 the Company entered into subscription agreements for a private placement of its common stock,with a group of investors, including a strategic investor which is also a key customer and intellectual property licensee of the Company as well as all of the Company’s executive officers and all members of the Board of Directors. As a result of the private placement, the Company agreed to issue 1,025,574 shares of common stock at a price of $1.76 per share for total gross proceeds of $1,805,000. As part of the private placement, the Company’s management and Board of Directors purchased 315,346 shares of common stock for gross proceeds of $555,000. Included in the aggregate proceeds was $1,505,000 in stock subscriptions receivable as of June 30, 2017. Proceeds of $505,000 related to the stock subscriptions receivable were received from July 1, 2017 through the date of filing of this Form 10-Q, and therefore were reflected as an asset in the condensed consolidated balance sheet. The Company agreed to extend the payment term of $1,000,000 with respect to one investor for an additional 30 days to August 28, 2017, and therefore this amount is reflected as a reduction of stockholders’ equity in the condensed consolidated balance sheet. The issuance of the Common Stock was exempt from the registration requirements of the Securities Act of 1933 pursuant to Section 4(a)(2) of such Securities Act and Regulation D promulgated thereunder and such Common Stock will therefore be restricted. Each investor gave representations that he, she or it was an “accredited investor” (as defined under Rule 501 of Regulation D) and that he, she or it is purchasing such securities without a present view toward a distribution of the securities. In addition, there was no general solicitation conducted in connection with the offer and sale of the securities.