SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 01, 2023	Dec. 26, 2021	Dec. 27, 2020
Summary Of Significant Accounting Policies [Line Items]
Fiscal period, length	364 days	364 days	371 days
Deposits	$ 2,400,000	$ 3,900,000
Impairment Of Intangible Asset Finite Lived Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag			CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Goodwill, impairment loss	0	0	$ 0
Impairment losses	0	0	7,239,514
Goodwill, amount expected to be tax deductible	50,400,000
Advertising expense	1,800,000	1,300,000	1,600,000
Tax deductible goodwill	786,455	$ 996,763
Operating loss carryforward, not subject to expiration	3,900,000
Net operating loss carry forward limitation	1,300,000
Other Assets
Summary Of Significant Accounting Policies [Line Items]
Software assets	2,500,000
Reclassifications of other assets	$ 1,300,000
Trade names
Summary Of Significant Accounting Policies [Line Items]
Impairment of intangible assets, finite-lived			3,700,000
Client partner list
Summary Of Significant Accounting Policies [Line Items]
Impairment of intangible assets, finite-lived			$ 3,500,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Lessee, operating lease, renewal term (in years)	3 years
Finite-lived intangible asset, useful life	3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	7 years
Lessee, operating lease, renewal term (in years)	10 years
Finite-lived intangible asset, useful life	10 years