STOCKHOLDERS' EQUITY (Tables)

9 Months Ended

Sep. 30, 2022

STOCKHOLDERS' EQUITY

Summary of activity for stock options and restricted stock

The following table summarizes the activity for stock options and restricted stock for the nine months ended September 30, 2022:

	Stock Options	Restricted Stock
Equity awards outstanding, beginning of year	2,467,537	12,032,040
Changes during the year:
Granted	2,975,000	4,051,606
Exercised or vested	(130,607)	(2,581,705)
Expired or Forfeited	(158,193)	(2,075,112)
Equity awards outstanding, end of period	5,153,737	11,426,829

Schedule of compensation cost related to unvested awards

As of September 30, 2022, total compensation cost related to unvested awards not yet recognized and the weighted-average periods over which the awards are expected to be recognized were as follows:

(in thousands)		Stock Options	Restricted Stock
Unrecognized compensation cost	$	9,034	$	28,086
Expected weighted-average period in years of compensation cost to be recognized		3.5		2.3