XML 25 R16.htm IDEA: XBRL DOCUMENT
v3.25.3

Private Placement Equity Offering | 9 Months Ended
--- | ---
Sep. 30, 2025
Equity [Abstract] |
Private Placement Equity Offering | 9. Private Placement Equity Offering On August 8, 2025, we entered into a securities purchase agreement with the purchasers, for a private placement of (i) 13,225,227 shares of common stock at a purchase price of $1.50 per share and (ii) 524,141 shares of Series A convertible preferred stock, which would automatically convert upon stockholder approval into 5,241,410 shares of common stock, at a conversion price of $1.50 per share (stated value of $15.00 per share) for aggregate gross proceeds of $27.7 million, and which closed on August 12, 2025. In connection with the private placement equity offering, we incurred issuance costs of $1.5 million. The Series A convertible preferred stock is convertible to common stock at a ratio of ten shares of common stock for each share of Series A convertible preferred stock and has a par value of $0.01. The Series A convertible preferred stock ranks senior to common stock with respect to dividend rights and rights on the distribution of assets in an event of liquidation. The Series A convertible preferred stockholders have no voting rights and are entitled to receive dividends on an as converted basis in the same form as dividends granted to holders of common stock. Upon a liquidation, the proceeds available for distribution would be paid pari passu among the holders of shares of common stock and Series A convertible preferred stock, pro rata based on the number of shares held by each such holder and on an as converted basis. The 13,225,227 shares of common stock and 5,241,410 shares of common stock issuable upon automatic conversion of the Series A convertible preferred stock are registered for resale pursuant to a registration statement filed with and declared effective by the SEC in September 2025. At a special meeting of stockholders held on October 13, 2025, the Company’s stockholders approved, pursuant to Nasdaq Listing Rule 5635(d), the issuance of shares of common stock in connection with the conversion of the Series A convertible preferred stock, which could, under certain circumstances that may occur in the future, exceed 19.99% of the number of shares of the common stock issued and outstanding prior to such issuance. We evaluated the terms of the Series A convertible preferred stock under the guidance of ASC 480-10, Distinguishing Liabilities from Equity, and ASC 815-40 and recorded the Series A convertible preferred stock in stockholders’ equity in the condensed consolidated balance sheets.

X
- Definition Private placement equity offering. + References No definition available. + Details
Name: | hrtx_PrivatePlacementEquityOfferingTextBlock
Namespace Prefix: | hrtx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration