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Stockholders’ Equity (Tables)
12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
Schedule of valuation assumptions
The key inputs into the Black-Scholes Option Pricing Model used to estimate the fair value of the Pre-Funded Warrants as of the issuance on June 21, 2022 were as follows:
Risk-free interest rate3.21%
Expected volatility90.0%
Term until liquidation (years)2.00
Stock price$1.11
Strike price (exercise fee)$4.5 million
The following table sets forth significant assumptions used in the Monte Carlo model for market-based options to determine the fair value of the options at the date of grant for the year ended December 31, 2021. There were no options granted during the year ended December 31, 2022.
Year Ended December 31, 2021
Risk-free interest rate1.61 %
Expected volatility of common stock90.00 %
Expected life of options in years10
Dividend yield— %