Stock Compensation (Tables)

6 Months Ended

Jun. 30, 2022

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 options and shares purchased under the ESPP:

	Three Months Ended June 30, 2022		Six Months Ended June 30, 2022
	Stock Options	ESPP	Stock Options	ESPP
Expected life	N/A	0.5 Years	5.0 Years	0.5 Years
Expected stock price volatility	N/A	0.31	0.40	0.31
Risk-free interest rate	N/A	0.22%	1.89%	0.22%

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 June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
RSA, RSU, and PSU expense	$	2,470	$	1,695	$	5,238	$	3,745
Stock option and ESPP expense	611		572		1,183		1,159
Total stock compensation expense	$	3,081	$	2,267	$	6,421	$	4,904