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Stock Compensation (Tables)
 3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Weighted-Average Assumptions Used to Determine the Fair Value of Options
The following weighted-average assumptions were used to determine the fair value of shares purchased under the ESPP:
Three Months Ended
March 31, 2024
ESPP
Expected life0.5 Years
Expected stock price volatility0.48
Risk-free interest rate5.26%
Summary of Total Stock Compensation Expenses
The following table summarizes total stock compensation expenses prior to the capitalization of amounts into Deferred preservation and Inventory costs (in thousands):
Three Months Ended
March 31,
20242023
RSA, RSU, and PSU expense$2,985 $2,641 
Stock option and ESPP expense687 872 
Total stock compensation expense$3,672 $3,513