COMMON STOCK WARRANTS AND EARN-OUT LIABILITY (Details) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended
	Jul. 16, 2021 tranche $ / shares shares	Sep. 28, 2025 USD ($)	Sep. 29, 2024 USD ($)	Apr. 03, 2022 USD ($) shares	Sep. 28, 2025 USD ($)	Sep. 29, 2024 USD ($)	Dec. 31, 2024 USD ($)
Common Stock Warrants And Earn-out Liability [Line Items]
Class of warrant or right, outstanding (in shares) | shares	14,666,644
Warrant liability | $		$ 3,752			$ 3,752		$ 813
Change in fair value of warrant liability | $		3,019	$ (1,041)		2,939	$ (7,570)
Earn-out liability | $		1,870			1,870		1,148
Change in fair value of earn-out liability | $		1,126	$ (634)		722	$ (2,341)
Empower Sponsor Holdings Llc
Common Stock Warrants And Earn-out Liability [Line Items]
Earn-out liability | $		$ 1,870			$ 1,870		$ 1,148
Empower Sponsor Holdings Llc | Unvested Earn-Out Shares
Common Stock Warrants And Earn-out Liability [Line Items]
Business acquisition, equity interest issued or issuable, number of shares (in shares) | shares	2,187,500
Number of tranches | tranche	2
Empower Sponsor Holdings Llc | Tranche One
Common Stock Warrants And Earn-out Liability [Line Items]
Stock issued during period, shares, acquisitions (in shares) | shares				1,093,750
Stock issued during period, value, acquisitions | $				$ 14,689
Empower Sponsor Holdings Llc | Tranche Two
Common Stock Warrants And Earn-out Liability [Line Items]
Earnout arrangement, maximum term (in years)	7 years
Public Warrants
Common Stock Warrants And Earn-out Liability [Line Items]
Class of warrant or right, outstanding (in shares) | shares	9,999,977
Public Warrants | Valuation date price
Common Stock Warrants And Earn-out Liability [Line Items]
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares	$ 0.01
Warrants and rights outstanding, redemption period	30 days
Share price (in dollars per share) | $ / shares	$ 18.00
Public Warrants | Measurement Input Share Price
Common Stock Warrants And Earn-out Liability [Line Items]
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares	0.10
Share price (in dollars per share) | $ / shares	$ 10.00
Private Warrants
Common Stock Warrants And Earn-out Liability [Line Items]
Class of warrant or right, outstanding (in shares) | shares	4,666,667
Private and Public Warrants
Common Stock Warrants And Earn-out Liability [Line Items]
Class of warrant or right, number of securities called by each warrant or right (in shares) | shares	1
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares	$ 11.50
Warrants and rights outstanding, term (in years)	5 years