Business	3 Months Ended
Mar. 31, 2023
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business	1. Business We are a commercial-stage biotechnology company focused on improving the lives of patients by developing and commercializing therapeutic innovations that improve medical care. Our advanced science, patented technologies, and innovative approach to drug discovery and development have allowed us to create and commercialize a portfolio of products that aim to advance the standard of care for acute care and oncology patients. ZYNRELEF (bupivacaine and meloxicam) extended-release solution (“ZYNRELEF”) is approved in the U.S., 31 European countries and Canada for the management of postoperative pain. APONVIE (aprepitant) injectable emulsion (“APONVIE”) is approved in the U.S. for the prevention of postoperative nausea and vomiting and became commercially available in March 2023. CINVANTI (aprepitant) injectable emulsion (“CINVANTI”) and SUSTOL (granisetron) extended-release injection (“SUSTOL”) are both approved in the United States (“U.S.”) for the prevention of chemotherapy-induced nausea and vomiting. HTX-034, an investigational agent, is our next-generation product candidate which has been evaluated for the management of postoperative pain. We paused the development of HTX-034 to focus on the efficacy supplement to further expand the ZYNRELEF indication to broadly include soft tissue and orthopedic surgical procedures. We have incurred significant operating losses and negative cash flows from operations. As of March 31, 2023 we had an accumulated deficit of $1.8 billion and cash, cash equivalents and short-term investments of $60.0 million. In addition, our net loss for the three months ended March 31, 2023 was $32.8 million. These factors raise substantial doubt regarding our ability to continue as a going concern for a period of at least one year from the date this Quarterly Report on Form 10-Q is filed with the U.S. Securities and Exchange Commission (“SEC”). In order to meet our cash requirements, we may be required to obtain additional funds and if we are not able to obtain adequate funds, we may be required to delay, reduce the scope of, or eliminate activities to support our Products and reduce personnel and related costs, which could have a material adverse effect on our business. Our capital requirements and liquidity for the next twelve months will depend on numerous factors, including but not limited to: the degree of commercial success of our Products; the impact of competitive products; the timing and cost to manufacture our Products; the costs associated with the U.S. commercial launch of ZYNRELEF and APONVIE; the time, cost and outcome involved in seeking a further expanded label for ZYNRELEF in the U.S.; our ability to establish and maintain strategic collaborations or partnerships for research, development, clinical testing, manufacturing and marketing of our Products and product candidates; and general market conditions. Management’s view of our liquidity relies on estimates and assumptions about the market opportunity for the expanded U.S. label of ZYNRELEF, which estimates and assumptions are subject to significant uncertainty. We may not be able to raise sufficient additional capital when needed on favorable terms, or at all. If we are unable to obtain adequate funds, we may be required to curtail significantly or cease our operations. If we issue additional equity securities or securities convertible into equity securities to raise funds, our stockholders will suffer dilution of their investment, and such issuance may adversely affect the market price of our common stock. Any new debt financing we enter into may involve covenants that restrict our operations. These restrictive covenants may include, among other things, limitations on borrowing and specific restrictions on the use of our assets, as well as prohibitions on our ability to create liens, pay dividends, redeem capital stock or make investments. In the event that additional funds are obtained through arrangements with collaborative partners, these arrangements may require us to relinquish rights to some of our technologies, product candidates or Products on terms that are not favorable to us or require us to enter into a collaboration arrangement that we would otherwise seek to develop and commercialize ourselves. If adequate funds are not available, we may default on our indebtedness, which could have a material adverse effect on our business. The accompanying condensed consolidated financial statements have been prepared assuming we will continue to operate as a going concern, which contemplates the realization of assets and settlement of liabilities in the normal course of business, and do not reflect any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classifications of liabilities that may results from uncertainty related to its ability to continue as a going concern.

Business

3 Months Ended

Mar. 31, 2023

Organization Consolidation And Presentation Of Financial Statements [Abstract]

1. Business

We are a commercial-stage biotechnology company focused on improving the lives of patients by developing and commercializing therapeutic innovations that improve medical care. Our advanced science, patented technologies, and innovative approach to drug discovery and development have allowed us to create and commercialize a portfolio of products that aim to advance the standard of care for acute care and oncology patients.

ZYNRELEF (bupivacaine and meloxicam) extended-release solution (“ZYNRELEF”) is approved in the U.S., 31 European countries and Canada for the management of postoperative pain. APONVIE (aprepitant) injectable emulsion (“APONVIE”) is approved in the U.S. for the prevention of postoperative nausea and vomiting and became commercially available in March 2023. CINVANTI (aprepitant) injectable emulsion (“CINVANTI”) and SUSTOL (granisetron) extended-release injection (“SUSTOL”) are both approved in the United States (“U.S.”) for the prevention of chemotherapy-induced nausea and vomiting. HTX-034, an investigational agent, is our next-generation product candidate which has been evaluated for the management of postoperative pain. We paused the development of HTX-034 to focus on the efficacy supplement to further expand the ZYNRELEF indication to broadly include soft tissue and orthopedic surgical procedures.

We have incurred significant operating losses and negative cash flows from operations. As of March 31, 2023 we had an accumulated deficit of $1.8 billion and cash, cash equivalents and short-term investments of $60.0 million. In addition, our net loss for the three months ended March 31, 2023 was $32.8 million. These factors raise substantial doubt regarding our ability to continue as a going concern for a period of at least one year from the date this Quarterly Report on Form 10-Q is filed with the U.S. Securities and Exchange Commission (“SEC”).

In order to meet our cash requirements, we may be required to obtain additional funds and if we are not able to obtain adequate funds, we may be required to delay, reduce the scope of, or eliminate activities to support our Products and reduce personnel and related costs, which could have a material adverse effect on our business. Our capital requirements and liquidity for the next twelve months will depend on numerous factors, including but not limited to: the degree of commercial success of our Products; the impact of competitive products; the timing and cost to manufacture our Products; the costs associated with the U.S. commercial launch of ZYNRELEF and APONVIE; the time, cost and outcome involved in seeking a further expanded label for ZYNRELEF in the U.S.; our ability to establish and maintain strategic collaborations or partnerships for research, development, clinical testing, manufacturing and marketing of our Products and product candidates; and general market conditions. Management’s view of our liquidity relies on estimates and assumptions about the market opportunity for the expanded U.S. label of ZYNRELEF, which estimates and assumptions are subject to significant uncertainty.

We may not be able to raise sufficient additional capital when needed on favorable terms, or at all. If we are unable to obtain adequate funds, we may be required to curtail significantly or cease our operations. If we issue additional equity securities or securities convertible into equity securities to raise funds, our stockholders will suffer dilution of their investment, and such issuance may adversely affect the market price of our common stock.

Any new debt financing we enter into may involve covenants that restrict our operations. These restrictive covenants may include, among other things, limitations on borrowing and specific restrictions on the use of our assets, as well as prohibitions on our ability to create liens, pay dividends, redeem capital stock or make investments. In the event that additional funds are obtained through arrangements with collaborative partners, these arrangements may require us to relinquish rights to some of our technologies, product candidates or Products on terms that are not favorable to us or require us to enter into a collaboration arrangement that we would otherwise seek to develop and commercialize ourselves. If adequate funds are not available, we may default on our indebtedness, which could have a material adverse effect on our business.

The accompanying condensed consolidated financial statements have been prepared assuming we will continue to operate as a going concern, which contemplates the realization of assets and settlement of liabilities in the normal course of business, and do not reflect any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classifications of liabilities that may results from uncertainty related to its ability to continue as a going concern.