Subsequent Events	12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Note 14 – Subsequent Events Subsequent to December 31, 2020, the Company paid the final principal and accrued interest payment to MGHIF and the lien on the Company’s IP was released. On February 11, 2021, the Company closed the February 2021 Offering with a single U.S.-based, healthcare-focused institutional investor for the purchase of (i) 2,784,184 shares of common stock and (ii) 5,549,149 pre-funded warrants, with each pre-funded warrant exercisable for one share of common stock. The Company also issued to the investor, in a concurrent private placement, unregistered common warrants to purchase 4,166,666 shares of the Company’s common stock. Each share of common stock and accompanying common warrant were sold together at a combined offering price of $3.00, and each pre-funded warrant and accompanying common warrant were sold together at a combined offering price of $2.99. The pre-funded warrants are immediately exercisable, at an exercise price of $0.01, and may be exercised at any time until all of the pre-funded warrants are exercised in full. The common warrants will have an exercise price of $3.55 per share, will be exercisable commencing on the six-month anniversary of the date of issuance, and will expire five and one half (5.5) years from the date of issuance. The February 2021 Offering raised aggregate net proceeds of $23.4 million, and gross proceeds of $25.0 million. As of March 19, 2021, all pre-funded warrants issued in the February 2021 Offering have been exercised. As previously reported, on November 23, 2020, the Company entered into a Purchase Agreement with the Holder pursuant to which the Company issued to the Investor, securities of the Company, including Existing Warrants to purchase up to 4,842,615 shares of common stock. The Existing Warrants were exercisable six months after their issuance at an exercise price of $1.94 per share and expire on the fifth and a half year anniversary of the date of issuance. On March 9, 2021, the Company entered into the Exercise Agreement with the Holder. Pursuant to the Exercise Agreement, in order to induce the Holder to exercise all of the remaining 4,842,615 outstanding Existing Warrants for cash, pursuant to the terms of and subject to beneficial ownership limitations contained in the Existing Warrants, the Company agreed to issue to the Holder, New Warrants to purchase 0.65 shares of common Stock for each share of common stock issued upon such exercise of the remaining 4,842,615 outstanding Existing Warrants pursuant to the Exercise Agreement or an aggregate of 3,147,700 New Warrants. The terms of the New Warrants will be substantially similar to those of the Existing Warrants, except that the New Warrants will have an exercise price of $3.56. The New Warrants will be immediately exercisable and will expire five years from the date of the Exercise Agreement. On March 12, 2021, the Company and the Holder amended the Exercise Agreement to provide that the Holder would pay the Company $0.08125 for each New Warrant issued to the Holder. The Holder will pay an aggregate of $255,751 to the Company for the purchase of the New Warrants. The Company received aggregate gross proceeds before expenses of approximately $9.65 million from the exercise of all of the remaining 4,842,615 outstanding Existing Warrants held by the Holder and the payment of the purchase price for the New Warrants. In March 2021, the Company entered into a lease extension for its office and laboratory space in Holzgerlingen, Germany. The extension is for four years beginning in September of 2021 with an optional four year extension through September 2029. The total minimum payments due over the four year extension is approximately $810,000. The lease is subject to additional charges such as utilities and other costs.

Subsequent Events

12 Months Ended

Dec. 31, 2020

Note 14 – Subsequent Events

Subsequent to December 31, 2020, the Company paid the final principal and accrued interest payment to MGHIF and the lien on the Company’s IP was released.

On February 11, 2021, the Company closed the February 2021 Offering with a single U.S.-based, healthcare-focused institutional investor for the purchase of (i) 2,784,184 shares of common stock and (ii) 5,549,149 pre-funded warrants, with each pre-funded warrant exercisable for one share of common stock. The Company also issued to the investor, in a concurrent private placement, unregistered common warrants to purchase 4,166,666 shares of the Company’s common stock. Each share of common stock and accompanying common warrant were sold together at a combined offering price of $3.00, and each pre-funded warrant and accompanying common warrant were sold together at a combined offering price of $2.99. The pre-funded warrants are immediately exercisable, at an exercise price of $0.01, and may be exercised at any time until all of the pre-funded warrants are exercised in full. The common warrants will have an exercise price of $3.55 per share, will be exercisable commencing on the six-month anniversary of the date of issuance, and will expire five and one half (5.5) years from the date of issuance. The February 2021 Offering raised aggregate net proceeds of $23.4 million, and gross proceeds of $25.0 million. As of March 19, 2021, all pre-funded warrants issued in the February 2021 Offering have been exercised.

As previously reported, on November 23, 2020, the Company entered into a Purchase Agreement with the Holder pursuant to which the Company issued to the Investor, securities of the Company, including Existing Warrants to purchase up to 4,842,615 shares of common stock. The Existing Warrants were exercisable six months after their issuance at an exercise price of $1.94 per share and expire on the fifth and a half year anniversary of the date of issuance. On March 9, 2021, the Company entered into the Exercise Agreement with the Holder. Pursuant to the Exercise Agreement, in order to induce the Holder to exercise all of the remaining 4,842,615 outstanding Existing Warrants for cash, pursuant to the terms of and subject to beneficial ownership limitations contained in the Existing Warrants, the Company agreed to issue to the Holder, New Warrants to purchase 0.65 shares of common Stock for each share of common stock issued upon such exercise of the remaining 4,842,615 outstanding Existing Warrants pursuant to the Exercise Agreement or an aggregate of 3,147,700 New Warrants. The terms of the New Warrants will be substantially similar to those of the Existing Warrants, except that the New Warrants will have an exercise price of $3.56. The New Warrants will be immediately exercisable and will expire five years from the date of the Exercise Agreement. On March 12, 2021, the Company and the Holder amended the Exercise Agreement to provide that the Holder would pay the Company $0.08125 for each New Warrant issued to the Holder. The Holder will pay an aggregate of $255,751 to the Company for the purchase of the New Warrants. The Company received aggregate gross proceeds before expenses of approximately $9.65 million from the exercise of all of the remaining 4,842,615 outstanding Existing Warrants held by the Holder and the payment of the purchase price for the New Warrants.

In March 2021, the Company entered into a lease extension for its office and laboratory space in Holzgerlingen, Germany. The extension is for four years beginning in September of 2021 with an optional four year extension through September 2029. The total minimum payments due over the four year extension is approximately $810,000. The lease is subject to additional charges such as utilities and other costs.