INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense (benefit) based on U.S. federal statutory rate	$ (9,583)	$ (18,590)	$ (4,335)
State and local income taxes, net of federal income tax effect (1)	550	1,341	(1,258)
Change in valuation allowance	12,704	57,626	(58)
Other	102	118	(371)
Hiring tax credits	(2,700)	(5,376)	(6,325)
Foreign Tax Credits	478	0	0
Executive compensation	206	865	2,036
Goodwill and intangible asset impairment charge	0	0	2,287
Wages on Hiring Tax Credits	567	1,129	1,328
Company-owned life insurance	(1,035)	(1,037)	(1,205)
Meals & entertainment	131	133	219
Stock-based compensation	1,038	899	724
Other	109	95	97
Change in Unrecognized Tax Benefits	(136)	(99)	(206)
Income tax expense (benefit)	$ 2,329	$ 37,224	$ (6,472)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax expense (benefit) based on U.S. federal statutory rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal income tax effect (1)	(1.20%)	(1.50%)	6.10%
Change state and local valuation allowance	(27.80%)	(65.10%)	0.30%
Other	(0.20%)	(0.20%)	1.80%
Foreign Tax Credits	(1.00%)	0.00%	0.00%
Change in Unrecognized Tax Benefits	(0.30%)	(0.10%)	(1.00%)
Hiring tax credits	5.90%	6.10%	30.60%
Executive compensation	(0.50%)	(1.00%)	(9.90%)
Goodwill and intangible asset impairment charge	0.00%	0.00%	(11.10%)
Company-owned life insurance	2.30%	1.20%	5.80%
Meals & entertainment	(0.30%)	(0.20%)	(1.10%)
Stock-based compensation	(2.30%)	(1.00%)	(3.50%)
Other	(0.30%)	(0.10%)	(0.50%)
Wages on Hiring Tax Credits	(1.20%)	(1.30%)	(6.40%)
Total income tax expense (benefit) and effective tax rate	(5.10%)	(42.00%)	31.30%
Goodwill and intangible asset impairment charge			$ 8,900
Goodwill and intangible asset impairment charge	$ 200	$ 59,674	9,485
Canada
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Foreign withholdings	81	87	257
Other	$ 155	$ (200)	$ (71)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Foreign withholdings	(0.20%)	(0.10%)	(1.20%)
Other	(0.30%)	0.20%	0.40%
India
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Other	$ 123	$ 1	$ 4
Statutory tax rate difference between India and U.S.	356	384	579
India tax holiday	$ (324)	$ (406)	$ (423)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Other	(0.30%)	0.00%	0.00%
Statutory tax rate difference between India and U.S.	(0.80%)	(0.40%)	(2.80%)
India tax holiday	0.70%	0.50%	2.00%
Other foreign jurisdictions
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory tax rate difference between India and U.S.	$ 463	$ 254	$ 249
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory tax rate difference between India and U.S.	(0.90%)	(0.20%)	(1.20%)