License Agreements	3 Months Ended
Mar. 31, 2022
Revenue From Contract With Customer [Abstract]
License Agreements	6. License Agreements Celgene License Agreement On April 9, 2014, the Company entered into a license agreement (as amended the “Celgene License Agreement”) with Celgene for exclusive rights for certain patents and a non-exclusive license for certain technology and know-how pertaining to FYARRO. The Celgene License Agreement will remain in effect from the effective date of April 9, 2014 until expiration of all milestone and royalty payment obligations under the agreement, unless terminated by either of the parties upon giving an advance notice as specified in the Celgene License Agreement. Under the terms of the Celgene License Agreement, Celgene agreed to supply the Company with licensed products of FYARRO necessary for clinical or non-clinical development. Under the terms of the Celgene License Agreement, Celgene is entitled to receive certain development milestone payments, royalties on net sales from licensed products under the agreement and any sublicense fees. During three months ended March 31, 2022, $0.2 million in royalties were accrued on net product sales recognized during the three months ended March 31, 2022. However, no payments related to milestones or royalties were paid during either of the three months ended March 31, 2022 or 2021. On August 30, 2021, the Company and Celgene entered into Amendment No. 1 (the “Amendment”) to the Celgene License Agreement related to certain intellectual property rights of Celgene pertaining to the compound known as FYARRO. Under the terms of the Amendment, the Company paid Celgene $5.8 million representing 50% of the previously outstanding payment obligation under the terms of the Celgene License Agreement, following the Effective Time of the PIPE Financing. Pursuant to the terms of the Amendment, the remaining previously outstanding payment obligation of $5.8 million, is due on the third anniversary of the Effective Time, or August 26, 2024 plus any accrued and unpaid interest due thereon (“Balloon Payment”). The Balloon Payment shall accrue interest, beginning August 26, 2021 until paid in full, at a rate equal to 4.0% per annum based on the weighted average amount outstanding during the applicable calendar quarter, and interest is payable quarterly in arrears. In addition, the parties agreed to amend the royalty rates payable to Celgene based on net sales of products subject to the Celgene License Agreement. On December 8, 2020, the Company entered into a license agreement (“EOC License Agreement”) with EOC Pharma (Hong Kong) Limited (“EOC”) under which the Company received $14.0 million in January 2021 in non-refundable upfront consideration as partial payment for the rights and licenses granted to EOC by the Company for the further development and commercialization of FYARRO in the People’s Republic of China, Hong Kong Special Administration Region, Macao Special Administrative Region and Taiwan (the “Licensed Territory”). In accordance with the Celgene License Agreement, the Company is required to pay 20% of all sublicense fees to Celgene. As such, the Company recognized $2.8 million of license expense in the year ended December 31, 2020 and had a corresponding $2.8 million sublicense payable to Celgene on the balance sheet as of December 31, 2020, which was paid in the three months ended March 31, 2021. During the year ended December 31, 2021, the Company recognized license revenue and received $1.0 million from EOC for achieving the FDA approval milestone on November 22, 2021. In accordance with the Celgene License Agreement, the Company recognized $0.2 million of license expense in the year ended December 31, 2021 and had a corresponding $0.2 million sublicense payable to Celgene on the balance sheet as of December 31, 2021, which was paid in the three months ended March 31, 2022. EOC License Agreement In December 2020, the Company entered into the EOC License Agreement with EOC for the further development of ABI-009, now called FYARRO, and commercialization of FYARRO in the Licensed Territory. Under the terms of the EOC License Agreement, the Company granted to EOC an exclusive, royalty-bearing license to develop and commercialize the product in the Licensed Territory. Unless earlier terminated, the term of the EOC License Agreement continues until the expiration of the royalty obligations. EOC has the right to terminate the agreement for any reason upon 120 days advance written notice. Either party may terminate the EOC License Agreement in the event that the other party breaches the agreement and fails to cure the breach, becomes insolvent or challenges certain of the intellectual property rights licensed under the agreement. The Company assessed the EOC License Agreement and concluded that EOC is a customer and identified the license of ABI-009 provided to EOC as the sole performance obligation. The $14.0 million upfront payment received from EOC is non-refundable and non-creditable and is considered fixed consideration. The Company recognized revenue of $14.0 million in December 2020 when the EOC License Agreement was signed, and the $14.0 million upfront payment was received in January 2021. The potential milestone payments and royalty payments under the EOC License Agreement are considered variable consideration and are constrained with respect to revenue recognition notification from EOC that the milestone and royalty payments have been achieved. The Company is eligible to receive an additional $257.0 million in the aggregate upon achievement of certain development, regulatory, and sales milestones, as well as tiered royalties on net sales in the Licensed Territory. Under the terms of the EOC License Agreement, EOC will fund all research, development, regulatory, marketing and commercialization activities in the defined Licensed Territory. The Company earned $1.0 million in milestone revenue upon achievement of the FDA approval milestone on November 22, 2021. EOC paid the $1.0 million milestone payment in December 2021. In accordance with the Company’s agreement with Celgene, 20% of the $1.0 million payment, or $0.2 million was accrued at December 31, 2021, and paid in January 2022.

License Agreements

3 Months Ended

Mar. 31, 2022

Revenue From Contract With Customer [Abstract]

6. License Agreements

Celgene License Agreement

On April 9, 2014, the Company entered into a license agreement (as amended the “Celgene License Agreement”) with Celgene for exclusive rights for certain patents and a non-exclusive license for certain technology and know-how pertaining to FYARRO.

The Celgene License Agreement will remain in effect from the effective date of April 9, 2014 until expiration of all milestone and royalty payment obligations under the agreement, unless terminated by either of the parties upon giving an advance notice as specified in the Celgene License Agreement. Under the terms of the Celgene License Agreement, Celgene agreed to supply the Company with licensed products of FYARRO necessary for clinical or non-clinical development.

Under the terms of the Celgene License Agreement, Celgene is entitled to receive certain development milestone payments, royalties on net sales from licensed products under the agreement and any sublicense fees. During three months ended March 31, 2022, $0.2 million in royalties were accrued on net product sales recognized during the three months ended March 31, 2022. However, no payments related to milestones or royalties were paid during either of the three months ended March 31, 2022 or 2021.

On August 30, 2021, the Company and Celgene entered into Amendment No. 1 (the “Amendment”) to the Celgene License Agreement related to certain intellectual property rights of Celgene pertaining to the compound known as FYARRO. Under the terms of the Amendment, the Company paid Celgene $5.8 million representing 50% of the previously outstanding payment obligation under the terms of the Celgene License Agreement, following the Effective Time of the PIPE Financing. Pursuant to the terms of the Amendment, the remaining previously outstanding payment obligation of $5.8 million, is due on the third anniversary of the Effective Time, or August 26, 2024 plus any accrued and unpaid interest due thereon (“Balloon Payment”). The Balloon Payment shall accrue interest, beginning August 26, 2021 until paid in full, at a rate equal to 4.0% per annum based on the weighted average amount outstanding during the applicable calendar quarter, and interest is payable quarterly in arrears. In addition, the parties agreed to amend the royalty rates payable to Celgene based on net sales of products subject to the Celgene License Agreement.

On December 8, 2020, the Company entered into a license agreement (“EOC License Agreement”) with EOC Pharma (Hong Kong) Limited (“EOC”) under which the Company received $14.0 million in January 2021 in non-refundable upfront consideration as partial payment for the rights and licenses granted to EOC by the Company for the further development and commercialization of FYARRO in the People’s Republic of China, Hong Kong Special Administration Region, Macao Special Administrative Region and Taiwan (the “Licensed Territory”). In accordance with the Celgene License Agreement, the Company is required to pay 20% of all sublicense fees to Celgene. As such, the Company recognized $2.8 million of license expense in the year ended December 31, 2020 and had a corresponding $2.8 million sublicense payable to Celgene on the balance sheet as of December 31, 2020, which was paid in the three months ended March 31, 2021.

During the year ended December 31, 2021, the Company recognized license revenue and received $1.0 million from EOC for achieving the FDA approval milestone on November 22, 2021. In accordance with the Celgene

License Agreement, the Company recognized $0.2 million of license expense in the year ended December 31, 2021 and had a corresponding $0.2 million sublicense payable to Celgene on the balance sheet as of December 31, 2021, which was paid in the three months ended March 31, 2022.

EOC License Agreement

In December 2020, the Company entered into the EOC License Agreement with EOC for the further development of ABI-009, now called FYARRO, and commercialization of FYARRO in the Licensed Territory. Under the terms of the EOC License Agreement, the Company granted to EOC an exclusive, royalty-bearing license to develop and commercialize the product in the Licensed Territory.

Unless earlier terminated, the term of the EOC License Agreement continues until the expiration of the royalty obligations. EOC has the right to terminate the agreement for any reason upon 120 days advance written notice. Either party may terminate the EOC License Agreement in the event that the other party breaches the agreement and fails to cure the breach, becomes insolvent or challenges certain of the intellectual property rights licensed under the agreement.

The Company assessed the EOC License Agreement and concluded that EOC is a customer and identified the license of ABI-009 provided to EOC as the sole performance obligation. The $14.0 million upfront payment received from EOC is non-refundable and non-creditable and is considered fixed consideration. The Company recognized revenue of $14.0 million in December 2020 when the EOC License Agreement was signed, and the $14.0 million upfront payment was received in January 2021.

The potential milestone payments and royalty payments under the EOC License Agreement are considered variable consideration and are constrained with respect to revenue recognition notification from EOC that the milestone and royalty payments have been achieved.

The Company is eligible to receive an additional $257.0 million in the aggregate upon achievement of certain development, regulatory, and sales milestones, as well as tiered royalties on net sales in the Licensed Territory. Under the terms of the EOC License Agreement, EOC will fund all research, development, regulatory, marketing and commercialization activities in the defined Licensed Territory. The Company earned $1.0 million in milestone revenue upon achievement of the FDA approval milestone on November 22, 2021. EOC paid the $1.0 million milestone payment in December 2021. In accordance with the Company’s agreement with Celgene, 20% of the $1.0 million payment, or $0.2 million was accrued at December 31, 2021, and paid in January 2022.