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Equity | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Equity | 9. Equity Common Stock There were 200,000,000 shares of common stock authorized at December 31, 2023 and 2022. On October 27, 2023, the Company completed an underwritten public offering (the "Public Offering") of 14,300,000 shares of the Company’s common stock at a public offering price of $10.50 per share. On November 17, 2023, the underwriters exercised their option to purchase 470,769 additional shares. The net proceeds from the offering were approximately $145.8 million, including the underwriting discounts and commissions and offering expenses paid by the Company. On August 11, 2023, the Company completed an at the market offering of 668,484 shares of the Company’s common stock. The net proceeds from the offering were approximately $9.9 million, including the underwriting discounts and commissions and offering expenses paid by the Company. On April 19, 2023, the Company completed a registered securities offering (the “Offering”) of 4,285,715 shares of the Company’s common stock at a price of $14.00 per share. The net proceeds from the Offering were approximately $57.5 million, including the underwriting discounts and commissions and offering expenses paid by the Company. On March 1, 2021, the Company completed the sale of 12,421,242 shares of common stock for gross proceeds of $138.0 million, and net proceeds of approximately $131.8 million, net of $6.2 million in fees. On August 3, 2021, the Company’s Board of Directors authorized the Company to repurchase an aggregate of up to $25.0 million of shares of the Company’s common stock. On August 10, 2021, The Company repurchased 1,806,358 shares of its common stock for approximately $25.0 million in privately negotiated transactions. There were no repurchases of common stock during the years ended December 31, 2023 or 2022. Redeemable Preferred Stock The Company issued shares of redeemable preferred stock in connection with its initial public offering in June 2006. As of December 31, 2023, and 2022, the redeemable preferred stock carrying value was $23.6 million and there were 20 million shares of redeemable preferred stock authorized. The redeemable preferred stock is not convertible into common stock but is redeemable at $9.00 per share, (i) upon the Company’s liquidation, dissolution or winding up, or the occurrence of certain mergers, consolidations or sales of all or substantially all of the Company’s assets, before any payment to the holders of the Company’s common stock, or (ii) at the Company’s option at any time. Holders of redeemable preferred stock are generally not entitled to vote on matters submitted to the stockholders, except with respect to certain matters that will affect them adversely as a class and are not entitled to receive dividends. The carrying value of the redeemable preferred stock was $7.11 per share at December 31, 2023 and 2022. The redeemable preferred stock is presented separately from stockholders’ equity in the consolidated balance sheets and any adjustments to its carrying value up to its redemption value of $9.00 per share are reported as a dividend. 2017 PIPE Warrants The 2017 common stock warrants (the “2017 PIPE Warrants”) had a five-year life and were exercisable by cash exercise only. The 2017 PIPE Warrants expired in 2022, and no 2017 PIPE warrants remained outstanding as of December 31, 2022. During the year ended December 31, 2022, there were approximately 2,312,000 2017 PIPE Warrant exercises for total cash proceeds of $3.5 million. 2018 PIPE Warrants The 2018 common stock warrants (the “2018 PIPE Warrants”) had a five-year life and were exercisable by cash or cashless exercise. The 2018 PIPE Warrants expired in May 2023, and no 2018 PIPE warrants remained outstanding as of December 31, 2023. During the year ended December 31, 2023, there were approximately 6,311,000 2018 PIPE Warrant exercises for total cash proceeds of $0.4 million. During the year ended December 31, 2022, there were approximately 2,168,000 2018 PIPE Warrant exercises for total cash proceeds of $0.4 million. SafeOp Surgical Merger Warrants The SafeOp common stock warrants (the “SafeOp Warrants”), had a five-year life and were exercisable by cash or cashless exercise. The SafeOp Warrants expired in May 2023, and no SafeOp Warrants remained outstanding as of December 31, 2023. During the year ended December 31, 2023, there were 937,000 cashless SafeOp Warrant exercises. During the year ended December 31, 2022, there were approximately 257,000 cashless SafeOp Warrant exercises. Squadron Medical Warrants In connection with debt financing entered into with Squadron Medical in 2018, and amended in 2019 and 2020, the Company issued common stock warrants to Squadron Medical and a participant lender (the “Squadron Medical Warrants”). The Squadron Medical Warrants expire in May 2027 and are exercisable by cash exercise. No Squadron Medical Warrants have been exercised as of December 31, 2023. Executive Warrants The Company issued warrants to Mr. Patrick S. Miles, the Company’s Chairman and Chief Executive Officer (the “Executive Warrants”). The Executive Warrants had a five-year term and are exercisable by cash or cashless exercise. In October 2022, the term was extended to seven years. No Executive Warrants have been exercised as of December 31, 2023. A summary of all outstanding warrants as of December 31, 2023 is as follows (in thousands):
|  | Number of Warrants |  |  | Strike Price |  | Expiration
2018 Squadron Medical Warrants |  |  | 845 |  |  | $ | 3.15 |  | May 2027
2019 Squadron Medical Warrants |  |  | 4,839 |  |  | $ | 2.17 |  | May 2027
2020 Squadron Medical Warrants |  |  | 1,076 |  |  | $ | 4.88 |  | May 2027
Executive Warrants |  |  | 1,327 |  |  | $ | 5.00 |  | December 2024
Other* |  |  | 132 |  |  | $ | 7.45 |  | Various through June 2026
Total |  |  | 8,219 |  |  |  |  |
*Represents weighted average strike price |  |  |  |  |  |  |

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