STOCKHOLDERS' EQUITY - Stock option activity (Details) $ in Thousands	3 Months Ended
Mar. 31, 2023 USD ($) shares
Restricted stock
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Equity awards outstanding, beginning of year	8,732,286
Granted	3,017,736
Exercised or vested	(1,175,347)
Expired or Forfeited	(73,787)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	10,500,888
Unrecognized compensation cost \| $	$ 51,264
Expected weighted-average period in years of compensation cost to be recognized	3 years 2 months 12 days
Stock options
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Equity awards outstanding, beginning of year	5,135,685
Exercised or vested	(66,701)
Expired or Forfeited	(192,500)
Equity awards outstanding, end of period	4,876,484
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unrecognized compensation cost \| $	$ 6,988
Expected weighted-average period in years of compensation cost to be recognized	3 years 1 month 6 days

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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