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STOCK - BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 23, 2021 performance_based_milestone_target shares	Sep. 07, 2021 milestone	Oct. 31, 2021 shares	Jun. 26, 2022 USD ($) shares	Jun. 27, 2021 USD ($)	Jun. 26, 2022 USD ($) $ / shares shares	Jun. 27, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				$ 23,207	$ 1,877	$ 45,372	$ 3,099
Weighted average grant date fair value of options (in dollars per share) | $ / shares						$ 10.57	$ 4.56
Options granted (in shares)						578,865	4,477,360
Performance based milestone targets | milestone		3
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				2,567	1,877	$ 5,099	$ 3,099
Unrecognized compensation expense | $				25,300		$ 25,300
Expected period for recognition						2 years 3 months 25 days
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				9,048	0	$ 18,097	0
Unrecognized compensation expense | $				78,700		$ 78,700
Expected period for recognition						2 years 5 months 23 days
Shares granted (in shares)			6,300,000			0
New shares issued (in shares)	321,428
Performance based milestone targets | performance_based_milestone_target	3
PSUs | Founder One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)			2,100,000
PSUs | Founder Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)			2,100,000
PSUs | Founder Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)			2,100,000
PSUs | Spyce
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				800		$ 1,700
Unrecognized compensation expense | $				9,800		9,800
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				11,592	$ 0	22,176	$ 0
Unrecognized compensation expense | $				$ 45,500		$ 45,500
Expected period for recognition						1 year 6 months 29 days
Shares granted (in shares)						439,764	0
Fair value of shares earned | $						$ 1,300
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		35,166,753
Maximum number of new common stock authorized for issuance (in shares)						11,500,000
2021 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life				10 years		10 years
2021 Plan | Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				12 months		12 months
2021 Plan | Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				4 years		4 years
2009 Stock Plan And 2019 Equity Incentive Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life				10 years		10 years
2009 Stock Plan And 2019 Equity Incentive Plan | Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year		1 year
2009 Stock Plan And 2019 Equity Incentive Plan | Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				4 years		4 years
ESPP | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized for issuance (in shares)				3,000,000		3,000,000
Common stock reserved, issuance, increase period				10 years		10 years
Percentage of outstanding stock maximum						1.00%
Maximum shares allowable under the plan (in shares)				4,300,000		4,300,000

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