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Convertible Promissory Notes and Convertible Promissory Note Warrants | 3 Months Ended
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Mar. 31, 2024
Debt Disclosure [Abstract] |
Convertible Promissory Notes and Convertible Promissory Note Warrants | 5. Convertible Promissory Notes and Convertible Promissory Note Warrants In April 2022, the Private CalciMedica board of directors approved a convertible promissory note financing pursuant to which it could issue and sell up to $5.0 million of notes convertible into shares of common stock (the “convertible promissory notes”) and Convertible Promissory Note Warrants. The funding and issuance of the convertible promissory notes for gross proceeds of $3.5 million and Convertible Promissory Note Warrants to purchase shares of the Private CalciMedica’s common stock at an exercise price of $0.01 per share took place in multiple closings through October 2022. In November 2022, the Private CalciMedica board of directors amended the convertible promissory notes and Convertible Promissory Note Warrants to issue up to an additional $3.5 million (for a total of up to $8.5 million) and added the automatic conversion for a “de-SPAC” business combination or reverse merger transaction. In November 2022, Private CalciMedica issued additional convertible promissory notes for gross proceeds of $5.0 million and Convertible Promissory Note Warrants to purchase shares of Private CalciMedica’s common stock at an exercise price of $0.01 per share. The convertible promissory notes accrued interest at a rate of 6% per annum and had a maturity date of December 31, 2023. Immediately prior to the effective time of the Merger, all outstanding convertible promissory notes and unpaid and accrued interest automatically converted into 20,487,104 shares of Private CalciMedica’s common stock at a conversion price based on the equivalent valuation of the cash price paid per share by the private placement investors purchasing shares of common stock in the 2023 Private Placement multiplied by 0.85. Such shares of common stock were then converted into 590,031 shares of Graybug common stock at the effective time of the Merger in accordance with the Merger Agreement. In connection with each purchase of a convertible promissory note, Private CalciMedica issued to each holder of such convertible promissory note Convertible Promissory Note Warrants to purchase shares of the Private CalciMedica’s common stock at an exercise price of $0.01 per share. Each holder of the Convertible Promissory Note Warrants had the right to purchase up to a number of shares of Private CalciMedica’s common stock equal to (i) 15% (“Warrant Coverage”) of the principal amount of the convertible promissory note purchased by such holder concurrently therewith, divided by (ii) the cash price paid per share by the investors in the qualified financing or an initial public offering, as applicable, or in the case of a “de-SPAC” business combination or a reverse merger transaction between Private CalciMedica and a publicly traded company (a “Public Combination”), the equivalent valuation of the lower of the cash price per share by the investors purchasing shares in the publicly traded company in connection with such Public Combination or the cash price per shares by the investors purchasing shares of Private CalciMedica’s common stock in connection with such Public Combination, in each case, rounding down to the nearest whole share and subject to the terms of the convertible promissory notes; provided, however, that any holder that purchased convertible promissory notes in excess of the holder’s pro rata commitment (as defined in the convertible promissory notes) received a 40% Warrant Coverage on the principal amount of the convertible promissory notes that is in excess of its pro rata commitment. The Convertible Promissory Note Warrants had a five-year term. In connection with the Merger, the Convertible Promissory Note Warrants were automatically net exercised in accordance with the terms of the Convertible Promissory Note Warrants. Immediately prior to the effective time of the Merger, 5,308,047 Convertible Promissory Note Warrants were converted into 5,308,047 shares of Private CalciMedica's common stock, which were converted into 152,875 shares of Graybug's common stock, based on the principal amount of the convertible promissory note. Prior to the Merger, the Convertible Promissory Note Warrants were not deemed equity and were classified as a liability in Private CalciMedica’s balance sheets. The Convertible Promissory Note Warrants were valued using a series of Monte Carlo simulations and Black-Scholes to determine the fair value, probability weighted for difference scenarios. The Monte Carlo simulations determined the liquidity event price. The Black-Scholes warrant value is discounted from the respective event date using the risk-free rate. The Black-Scholes valuation included standard assumptions such as exercise price, expected term, risk-free rate, volatility, and a dividend yield of zero. Private CalciMedica estimated the initial fair value of the Convertible Promissory Note Warrants utilizing the following range of assumptions for the difference scenarios: exercise price ($0.01), risk-free rate (3.02% - 4.20%), volatility (63% - 67%), and expected term (4.1 - 4.6 years). As of the date of the Merger, Private CalciMedica revalued the Convertible Promissory Note Warrants which were converted into 152,871 shares of common stock, using the price of the common stock of Graybug of $5.50.

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