XML 42 R30.htm IDEA: XBRL DOCUMENT v3.22.1
Stock-Based Compensation Plans (Tables)
 3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of components of stock compensation expense
The components of stock-based compensation expense were as follows:
Three months ended March 31,
20222021
(in thousands)
2007 Stock Incentive Plan$— $685 
2021 Stock Incentive Plan4,607 1,999 
Employee Stock Purchase Plan22 78 
Total Stock Compensation Expense$4,629 $2,762 
Summary of restricted stock activity
The following table summarizes restricted stock activity during the three months ended March 31, 2022:
Shares
Balance of unvested shares as of December 31, 2021560,608 
Shares granted— 
Shares forfeited— 
Shares vested— 
Balance of unvested shares as of March 31, 2022560,608