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EQUITY INCENTIVE PLAN, Restricted Stock Unit Activity (Details) - 2013 and 2021 Plans [Member] $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) Director $ / shares shares
RSU Awards [Member]
Restricted Stock Unit Activity [Abstract]
Number of members of board of directors receiving grant of RSU award | Director			2
Stock-based compensation expense | $	$ 5,840		$ 13,232
Number of Shares Underlying RSUs [Roll Forward]
Outstanding non-vested RSUs, beginning balance (in shares)		0	0
Granted (in shares)			4,861,315
Repurchased (in shares)			0
Restrictions lapsed (in shares)			0
Outstanding non-vested RSUs, ending balance (in shares)	4,861,315		4,861,315
Weighted Average Grant-Date Fair Value [Abstract]
Outstanding non-vested RSUs, beginning balance (in dollars per share) | $ / shares		$ 0	$ 0
Granted (in dollars per share) | $ / shares			8.03
Repurchased (in dollars per share) | $ / shares			0
Restrictions lapsed (in dollars per share) | $ / shares			0
Outstanding non-vested RSUs, ending balance (in dollars per share) | $ / shares	$ 8.03		$ 8.03
RSU Awards Subject to Service and Performance Conditions [Member] | Chief Executive Officer [Member]
Number of Shares Underlying RSUs [Roll Forward]
Granted (in shares)			1,703,460
RSU Awards Subject to Service and Performance Conditions [Member] | General Counsel [Member]
Number of Shares Underlying RSUs [Roll Forward]
Granted (in shares)			170,346
Restricted Stock Units Subject to Service and/or Performance Condition [Member] | Executive Chairman and Two Members of Board of Directors [Member]
Number of Shares Underlying RSUs [Roll Forward]
Granted (in shares)			1,800,000
RSU Awards Subject to Service, Market and Performance Conditions [Member]
Restricted Stock Unit Activity [Abstract]
Stock-based compensation expense | $		$ 7,393	$ 13,089
RSU Awards Subject to Service, Market and Performance Conditions [Member] | Chief Executive Officer [Member]
Number of Shares Underlying RSUs [Roll Forward]
Granted (in shares)			453,777

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- Definition

The number of members of the board of directors receiving an award of restricted stock units (RSU).

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

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The weighted average fair value at repurchased for nonvested equity-based awards issued 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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Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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 weighted average fair value at grant date for nonvested equity-based awards issued 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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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