Subsequent Events	12 Months Ended
Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 9. Subsequent Events Warrant Exercise Transaction On January 10, 2020 and January 15, 2020, the Company entered into warrant exercise agreements (the “Exercise Agreements”) with the holders (the “Holders”) of its Series A Warrants and Series B Warrants to purchase shares of the Company’s common stock (collectively, the “Warrants”), previously issued in a private placement by the Company in May 2019, pursuant to which the Holders agreed to exercise in cash their Warrants to purchase an aggregate of 6,898,224 shares of the Company’s common stock at a reduced exercise price of $0.715 per share, plus an additional $0.125 per share for the issuance of the private placement warrants for gross proceeds (before placement agent fees and expenses) to the Company of approximately $5.8 million (the “Exercise Transaction”). The Company intends to use the net proceeds from the Exercise Transaction to fund the ongoing phase 2a clinical trial in acute otitis media, as well as for working capital and other general corporate purposes. Under the Exercise Agreements, the Company also agreed to issue to the Holders new warrants to purchase up to 6,898,224 shares of the Company’s common stock at an exercise price of $0.72 per share, with an exercise period of five and a half years (the “Private Placement Warrants”). The Private Placement Warrants transaction subsequently closed and the Private Placement Warrants were issued on January 14, 2020 with respect to the Warrants exercised on January 10, 2020 and on or about January 17, 2020, with respect to the Warrants exercised on January 15, 2020. The shares of common stock underlying the Warrants are registered for offer and sale under the Securities Act of 1933, as amended (the “Securities Act”), pursuant to the Company’s effective registration statement on Form S-1 (File No. 333-232011). Common Stock Exchange Agreement On February 13, 2020, the Company entered into an exchange agreement (the “Exchange Agreement”) with Biotechnology Value Fund, L.P., Biotechnology Value Fund II, L.P. and Biotechnology Value Trading Fund OS, L.P. (the “Exchanging Stockholders”), pursuant to which the Exchanging Stockholders exchanged (the “Exchange”) 3,796,000 shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”), for 3,796 shares of newly designated Series X Convertible Preferred Stock (the “Series X Preferred Stock”). The Company agreed to reimburse the Exchanging Stockholders for their expenses in connection with the Exchange up to a total of $25,000. On February 13, 2020, in connection with the Exchange, the Company filed a Certificate of Designation (the “CoD”) setting forth the preferences, rights and limitations of the Series X Preferred Stock with the Secretary of State of the State of Delaware. Each share of Series X Preferred Stock will be convertible into 1,000 shares of Common Stock at the option of the holder at any time; subject to certain limitations, including, that the holder will be prohibited from converting Series X Preferred Stock into Common Stock if, as a result of such conversion, the holder, together with its affiliates, would beneficially own a number of shares of Common Stock above a conversion blocker, which is initially set at 9.99% of the total Common Stock then issued and outstanding immediately following the conversion of such shares of Series X Preferred Stock. In the event of the Company’s liquidation, dissolution or winding up, holders of Series X Preferred Stock will participate pari passu with any distribution of proceeds to holders of Common Stock. Holders of Series X Preferred Stock are entitled to receive dividends on shares of Series X Preferred Stock equal (on an as-if-converted-to-Common Stock basis) to and in the same form as dividends actually paid on the Common Stock or other junior securities of the Company. Shares of Series X Preferred Stock will generally have no voting rights, except as required by law and except that the consent of a majority of the holders of the outstanding Series X Preferred Stock will be required to amend the terms of the Series X Preferred Stock. The Series X Preferred Stock was issued without registration under the Securities Act of 1933, as amended (the “Securities Act”), in reliance on the exemption from registration contained in Section 3(a)(9) of the Securities Act. The Exchange was completed on February 19, 2020. Following the Exchange, the Company had 16,069,562 shares of Common Stock outstanding and 3,796 shares of Series X Preferred Stock outstanding, which are convertible into 3,796,000 shares of Common Stock.

Subsequent Events

12 Months Ended

Dec. 31, 2019

Note 9. Subsequent Events

Warrant Exercise Transaction

On January 10, 2020 and January 15, 2020, the Company entered into warrant exercise agreements (the “Exercise Agreements”) with the holders (the “Holders”) of its Series A Warrants and Series B Warrants to purchase shares of the Company’s common stock (collectively, the “Warrants”), previously issued in a private placement by the Company in May 2019, pursuant to which the Holders agreed to exercise in cash their Warrants to purchase an aggregate of 6,898,224 shares of the Company’s common stock at a reduced exercise price of $0.715 per share, plus an additional $0.125 per share for the issuance of the private placement warrants for gross proceeds (before placement agent fees and expenses) to the Company of approximately $5.8 million (the “Exercise Transaction”).

The Company intends to use the net proceeds from the Exercise Transaction to fund the ongoing phase 2a clinical trial in acute otitis media, as well as for working capital and other general corporate purposes.

Under the Exercise Agreements, the Company also agreed to issue to the Holders new warrants to purchase up to 6,898,224 shares of the Company’s common stock at an exercise price of $0.72 per share, with an exercise period of five and a half years (the “Private Placement Warrants”). The Private Placement Warrants transaction subsequently closed and the Private Placement Warrants were issued on January 14, 2020 with respect to the Warrants exercised on January 10, 2020 and on or about January 17, 2020, with respect to the Warrants exercised on January 15, 2020.

The shares of common stock underlying the Warrants are registered for offer and sale under the Securities Act of 1933, as amended (the “Securities Act”), pursuant to the Company’s effective registration statement on Form S-1 (File No. 333-232011).

Common Stock Exchange Agreement

On February 13, 2020, the Company entered into an exchange agreement (the “Exchange Agreement”) with Biotechnology Value Fund, L.P., Biotechnology Value Fund II, L.P. and Biotechnology Value Trading Fund OS, L.P. (the “Exchanging Stockholders”), pursuant to which the Exchanging Stockholders exchanged (the “Exchange”) 3,796,000 shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”), for 3,796 shares of newly designated Series X Convertible Preferred Stock (the “Series X Preferred Stock”). The Company agreed to reimburse the Exchanging Stockholders for their expenses in connection with the Exchange up to a total of $25,000.

On February 13, 2020, in connection with the Exchange, the Company filed a Certificate of Designation (the “CoD”) setting forth the preferences, rights and limitations of the Series X Preferred Stock with the Secretary of State of the State of Delaware. Each share of Series X Preferred Stock will be convertible into 1,000 shares of Common Stock at the option of the holder at any time; subject to certain limitations, including, that the holder will be prohibited from converting Series X Preferred Stock into Common Stock if, as a result of such conversion, the holder, together with its affiliates, would beneficially own a number of shares of Common Stock above a conversion blocker, which is initially set at 9.99% of the total Common Stock then issued and outstanding immediately following the conversion of such shares of Series X Preferred Stock. In the event of the Company’s liquidation, dissolution or winding up, holders of Series X Preferred Stock will participate pari passu with any distribution of proceeds to holders of Common Stock. Holders of Series X Preferred Stock are entitled to receive dividends on shares of Series X Preferred Stock equal (on an as-if-converted-to-Common Stock basis) to and in the same form as dividends actually paid on the Common Stock or other junior securities of the Company. Shares of Series X Preferred Stock will generally have no voting rights, except as required by law and except that the consent of a majority of the holders of the outstanding Series X Preferred Stock will be required to amend the terms of the Series X Preferred Stock.

The Series X Preferred Stock was issued without registration under the Securities Act of 1933, as amended (the “Securities Act”), in reliance on the exemption from registration contained in Section 3(a)(9) of the Securities Act.

The Exchange was completed on February 19, 2020. Following the Exchange, the Company had 16,069,562 shares of Common Stock outstanding and 3,796 shares of Series X Preferred Stock outstanding, which are convertible into 3,796,000 shares of Common Stock.