Nature of Business	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business Collegium Pharmaceutical, Inc. (the “Company” or “Collegium”) was incorporated in Delaware in April 2002 and then reincorporated in Virginia in July 2014. The Company has its principal operations in Stoughton, Massachusetts. The Company is a leading biopharmaceutical company focused on improving the lives of people living with serious and often misunderstood conditions. The Company’s product portfolio includes Jornay PM, Azstarys, Belbuca, Xtampza ER, Nucynta ER, Nucynta IR, Nucynta ER Authorized Generic (“AG”), and Nucynta IR AG (collectively the “Nucynta Products”), and Symproic. The Company’s operations are subject to certain risks and uncertainties. The principal risks include inability to continue successfully commercializing products, changing market and pricing conditions for products and development of competing products (including generic and authorized generic products), changing regulatory environment and reimbursement landscape, product-related litigation, manufacture of adequate commercial inventory, inability to secure adequate supplies of active pharmaceutical ingredients, key personnel retention, protection of intellectual property, and patent infringement litigation.

Nature of Business

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Collegium Pharmaceutical, Inc. (the “Company” or “Collegium”) was incorporated in Delaware in April 2002 and then reincorporated in Virginia in July 2014. The Company has its principal operations in Stoughton, Massachusetts. The Company is a leading biopharmaceutical company focused on improving the lives of people living with serious and often misunderstood conditions. The Company’s product portfolio includes Jornay PM, Azstarys, Belbuca, Xtampza ER, Nucynta ER, Nucynta IR, Nucynta ER Authorized Generic (“AG”), and Nucynta IR AG (collectively the “Nucynta Products”), and Symproic.

The Company’s operations are subject to certain risks and uncertainties. The principal risks include inability to continue successfully commercializing products, changing market and pricing conditions for products and development of competing products (including generic and authorized generic products), changing regulatory environment and reimbursement landscape, product-related litigation, manufacture of adequate commercial inventory, inability to secure adequate supplies of active pharmaceutical ingredients, key personnel retention, protection of intellectual property, and patent infringement litigation.