Acquisitions	12 Months Ended
Dec. 31, 2022
Business Combinations [Abstract]
Acquisitions	3. Acquisitions Censa Asset Acquisition On May 29, 2020, the Company completed its acquisition of Censa Pharmaceuticals, Inc. (“Censa”) pursuant to an Agreement and Plan of Merger, dated as of May 5, 2020 (the "Censa Merger Agreement"), by and among the Company, Hydro Merger Sub, Inc., the Company’s wholly owned, indirect subsidiary, and, solely in its capacity as the representative, agent and attorney-in-fact of the securityholders of Censa, Shareholder Representative Services LLC (the "Censa Merger"). Upon the closing of the Censa Merger, the Company paid to the Censa securityholders (i) cash consideration of $15.0 million, which consisted of an upfront payment of $10.4 million and an additional $4.6 million for the net assets on Censa’s opening balance sheet as of the date of the acquisition, and (ii) 845,364 shares of the Company’s common stock, which were valued at $42.9 million based on the closing stock price on the acquisition date. The number of shares issued was determined using a 30-day volume weighted average price (“VWAP”) pursuant to the Censa Merger Agreement. The Company determined that substantially all of the fair value is concentrated in sepiapterin, formerly known as PTC923, and accounted for the transaction as an asset acquisition under ASC 805-50. The purchase price consisted of the cash consideration of $15.0 million and $42.9 million in the Company’s common stock, in addition to $0.7 million of acquisition costs. As such, the total consideration transferred was determined to be $58.6 million. The opening balance sheet net assets of $4.6 million, which consisted of cash of $3.8 million and other current assets of $0.8 million, were determined to be non-qualifying assets and recorded at their fair values, respectively. The remaining consideration of $54.0 million was allocated to sepiapterin. As sepiapterin is an IPR&D asset, the Company concluded that it did not have any alternative future use, and accordingly, the fair value amount allocated to the IPR&D was expensed. Of the $54.0 million, $53.3 million is included in research and development expense and the $0.7 million related to the acquisition costs, is included in selling, general, and administrative expense within the Company’s statement of operations for the year ended December 31, 2020. Refer to Note 15 for to the terms and conditions of the Censa Merger Agreement.

Acquisitions

12 Months Ended

Dec. 31, 2022

3. Acquisitions

Censa Asset Acquisition

On May 29, 2020, the Company completed its acquisition of Censa Pharmaceuticals, Inc. (“Censa”) pursuant to an Agreement and Plan of Merger, dated as of May 5, 2020 (the "Censa Merger Agreement"), by and among the Company, Hydro Merger Sub, Inc., the Company’s wholly owned, indirect subsidiary, and, solely in its capacity as the representative, agent and attorney-in-fact of the securityholders of Censa, Shareholder Representative Services LLC (the "Censa Merger").

Upon the closing of the Censa Merger, the Company paid to the Censa securityholders (i) cash consideration of $15.0 million, which consisted of an upfront payment of $10.4 million and an additional $4.6 million for the net assets on Censa’s opening balance sheet as of the date of the acquisition, and (ii) 845,364 shares of the Company’s common stock, which were valued at $42.9 million based on the closing stock price on the acquisition date. The number of shares issued was determined using a 30-day volume weighted average price (“VWAP”) pursuant to the Censa Merger Agreement.

The Company determined that substantially all of the fair value is concentrated in sepiapterin, formerly known as PTC923, and accounted for the transaction as an asset acquisition under ASC 805-50. The purchase price consisted of the cash consideration of $15.0 million and $42.9 million in the Company’s common stock, in addition to $0.7 million of acquisition costs. As such, the total consideration transferred was determined to be $58.6 million. The opening balance sheet net assets of $4.6 million, which consisted of cash of $3.8 million and other current assets of $0.8 million, were determined to be non-qualifying assets and recorded at their fair values, respectively. The remaining consideration of $54.0 million was allocated to sepiapterin. As sepiapterin is an IPR&D asset, the Company concluded that it did not have any alternative future use, and accordingly, the fair value amount allocated to the IPR&D was expensed. Of the $54.0 million, $53.3 million is included in research and development expense and the $0.7 million related to the acquisition costs, is included in selling, general, and administrative expense within the Company’s statement of operations for the year ended December 31, 2020. Refer to Note 15 for to the terms and conditions of the Censa Merger Agreement.