CONVERTIBLE PROMISSORY NOTES

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

CONVERTIBLE PROMISSORY NOTES

(5) CONVERTIBLE PROMISSORY NOTES

On December 30, 2019, the Company issued convertible promissory notes (the “2019 Notes”) totaling $2.5 million to RA Capital Healthcare Fund, L.P., Blackwell Partners LLC - Series A, and RA Capital Nexus Fund, L.P. (the “Holders”). The 2019 Notes accrued interest at a rate of 6% per annum and were payable at the demand of the Holders on or after the Maturity Date of December 30, 2021, subject to earlier conversion or repayment in the event of a qualified financing or a change of control, as defined in the convertible promissory notes agreement. Due to certain embedded features, the Company elected to account for the 2019 Notes and all their embedded features under the fair value option. The 2019 Notes were issued at fair value, as such no changes in fair value were recorded between December 30, 2019 and December 31, 2019. The 2019 Notes were converted into Series A redeemable convertible preferred stock in connection with the initial closing of Series A redeemable convertible preferred stock on August 5, 2020, with a conversion price of 80% of $1.893 per share (the “Series A Original Issue Price”). The Company recorded a change in fair value of $0.6 million for the period January 1, 2020 through conversion on August 5, 2020. In relation to the 2019 Notes, there was $0.1 million of interest expense for the period January 1, 2020 through conversion on August 5, 2020.

On July 13, 2020, the Company issued convertible promissory notes (the “2020 Notes”) totaling $2.5 million to the Holders. The 2020 Notes accrued interest at a rate of 3% per annum and were payable at the demand of the Holders on or after the Maturity Date of October 31, 2020. The 2020 Notes converted into Series A redeemable convertible preferred stock in association with the initial closing of Series A redeemable convertible preferred stock on August 5, 2020. The 2020 Notes were issued at fair value and converted at the Series A Original Issue Price, as such no changes in fair value were recorded with respect to the 2020 Notes. In relation to the 2020 Notes, there was no interest expense for the year ended December 31, 2020.