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STOCK - BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 23, 2021 performance_based_milestone_target shares	Sep. 07, 2021 milestone	Oct. 31, 2021 shares	Sep. 25, 2022 USD ($) shares	Sep. 26, 2021 USD ($)	Sep. 25, 2022 USD ($) $ / shares shares	Sep. 26, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				$ 17,601	$ 3,008	$ 62,973	$ 6,104
Weighted average grant date fair value of options (in dollars per share) | $ / shares						$ 10.18	$ 4.76
Performance based milestone targets | milestone		3
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				2,771	3,008	$ 7,870	$ 6,104
Unrecognized compensation expense | $				20,900		$ 20,900
Expected period for recognition						2 years 2 months 1 day
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				9,048	0	$ 27,145	0
Unrecognized compensation expense | $				69,600		$ 69,600
Expected period for recognition						2 years 2 months 23 days
Shares granted (in shares) | shares			6,300,000			0
New shares issued (in shares) | 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) | shares			2,100,000
PSUs | Founder Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares) | shares			2,100,000
PSUs | Founder Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares) | shares			2,100,000
PSUs | Spyce
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				800		$ 2,500
Unrecognized compensation expense | $				9,800		9,800
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation | $				5,782	$ 0	27,958	$ 0
Unrecognized compensation expense | $				$ 33,700		$ 33,700
Expected period for recognition						1 year 8 months 23 days
Shares granted (in shares) | shares						566,245	0
Fair value of shares earned | $						$ 11,600
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized for issuance (in shares) | shares				35,166,753		35,166,753
Maximum number of new common stock authorized for issuance (in shares) | 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 | Minimum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				12 months		12 months
2021 Plan | Maximum | Stock Options
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 | Minimum | Stock Options
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 | Maximum | Stock Options
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) | 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) | shares				4,300,000		4,300,000

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