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STOCK - BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Thousands				1 Months Ended	12 Months Ended
	Jan. 01, 2023 shares	Nov. 23, 2021 performance_based_milestone_target shares	Nov. 21, 2021	Oct. 31, 2021 shares	Dec. 29, 2024 USD ($) tranche possible_scenario $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 25, 2022 USD ($) $ / shares shares	Sep. 07, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total reserved shares of common stock					31,707,440	36,190,848
Stock-based compensation | $					$ 39,024	$ 49,532	$ 78,736
Number of stock options (in shares)					13,169,869	13,219,388	13,813,922
Weighted average exercise price (in dollars per share) | $ / shares					$ 9.88	$ 7.77	$ 7.86
Intrinsic value of options exercised | $					$ 50,800	$ 7,500	$ 13,600
Dividend yield					0.00%
Unrecognized compensation expense | $					$ 21,600
Tax expense from award | $					$ 1,100
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of options (in dollars per share) | $ / shares					$ 9.72	$ 9.07
Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of options (in dollars per share) | $ / shares							$ 8.02
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total reserved shares of common stock					13,169,869	13,219,388
Contractual life					10 years
Stock-based compensation | $					$ 11,773	$ 8,878	$ 10,505
Dividend yield					0.00%	0.00%	0.00%
Expected period for recognition					2 years 29 days
Expected Volatility					45.38%	45.11%	44.25%
PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					1 year
Contractual life					10 years
Stock-based compensation | $					$ 18,705	$ 32,097	$ 36,194
Weighted average grant date fair value of options (in dollars per share) | $ / shares					$ 16.35
Unrecognized compensation expense | $					$ 9,800
Expected period for recognition					8 months 19 days
Shares granted (in shares)				6,300,000	0	0	6,621,248
Number of vesting tranches | tranche					7
Number of possible scenarios | possible_scenario					2
Unrecognized compensation expense | $					$ 103,000
Awards exercised					1,800,000
Fair value of award | $					$ 67,800
Granted (in dollars per share) | $ / shares					$ 0		$ 15.56
PSU | Company Stock Price Target $30.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option, exercise price range, upper range limit (in dollars per share) | $ / shares					30.0
PSU | Company Stock Price Target $75.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option, exercise price range, upper range limit (in dollars per share) | $ / shares					$ 75.00
PSU | Initial Public Offering Scenario
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life					10 years
Expected Volatility					52.00%
PSU | Change Of Control Scenario
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life					3 years
Expected Volatility					90.50%
PSU | Founder One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)				2,100,000
Awards exercised					600,000
PSU | Founder Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)				2,100,000
Awards exercised					600,000
PSU | Founder Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)				2,100,000
Awards exercised					600,000
PSU | Spyce
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $					$ 2,400	$ 3,400
Employee stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total reserved shares of common stock					4,111,331	4,111,331
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Stock-based compensation | $					$ 8,546	$ 8,557	$ 32,037
Expected period for recognition					1 year 8 months 1 day
Fair value of shares earned | $					$ 13,700	$ 6,300	$ 15,300
Shares granted (in shares)					535,789	428,428
Unrecognized compensation expense | $					$ 9,100
Awards exercised					479,078
Granted (in dollars per share) | $ / shares					$ 20.81	$ 9.07	$ 19.45
Spyce Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)		321,428
Shares outstanding (in shares)					85,395
Performance based milestone targets | performance_based_milestone_target		3
Minimum | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					12 months
Minimum | PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period					1 year 8 months 12 days
Minimum | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period		0 years
Maximum | Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					4 years
Maximum | PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period					4 years 4 months 24 days
Maximum | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period		4 years
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized for issuance (in shares)					35,166,753
Maximum number of new common stock authorized for issuance (in shares)					11,500,000
ESPP | Employee stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized for issuance (in shares)	4,111,331							3,000,000
Percentage of outstanding stock maximum					1.00%
Common stock reserved for issuance, increase, threshold period					10 years
Maximum shares allowable under the plan (in shares)	4,300,000
Number of additional shares authorized (in shares)	1,111,331
Shares available
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total reserved shares of common stock					8,516,216	10,572,899
Awards Prior to the 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life					10 years
Awards Prior to the 2021 Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					1 year
Awards Prior to the 2021 Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					4 years

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