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STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 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 six months ended June 30, 2022:

​	​	​	​	​
​	​	Stock Options	​	Restricted Stock
Equity awards outstanding, beginning of year	​	2,467,537	​	12,032,040
Changes during the year:	​	​	​	​
Granted	​	875,000	​	3,682,946
Exercised or vested	​	(63,455)	​	(2,369,743)
Expired or Forfeited	​	(53,567)	​	(1,840,386)
Equity awards outstanding, end of period	​	3,225,515	​	11,504,857

Schedule of compensation cost related to unvested awards

As of June 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	$	1,059	​	$	35,273
Expected weighted-average period in years of compensation cost to be recognized	​	1.5	​	​	1.6

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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