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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2022
Dec. 31, 2021
Jan. 01, 2021
Cash flows from operating activities:      
Net income (loss) $ (8,448) $ (8,417) $ (14,496)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Depreciation and amortization 17,489 17,146 18,743
Deferred income taxes, net (1,694) (2,738) (5,209)
(Gain) loss on sale/disposal of equipment (64) (24) (15)
Provision for doubtful accounts 243 102 1,330
Stock-based compensation 8,373 16,563 16,113
Accretion and fair value adjustments of contingent consideration 3,168 2,333 7,707
Changes in operating assets and liabilities, net of effects from business acquisitions:      
Accounts receivable 6,766 (14,209) 3,070
Contract assets (23,772) 3,138 35,498
Other receivables 1,494 138 (1,192)
Prepaid expenses and other current assets (1,230) 828 577
Other assets 3,223 (7,849) 9,955
Accounts payable (7,839) (4,700) 7,372
Accrued liabilities 12,970 1,625 (34,509)
Contract liabilities (914) 6,065 1,871
Right-of-use assets (332) (197) 210
Net cash provided by operating activities 9,433 9,804 47,025
Cash flows from investing activities:      
Purchase of equipment and leasehold improvements (9,602) (8,500) (5,076)
Proceeds from sale of equipment 75 46 17
Net cash used in investing activities (9,527) (8,454) (5,059)
Cash flows from financing activities:      
Payments on contingent consideration (10,206) (6,615) (1,433)
Receipt of restricted cash 10,679    
Payments on notes payable (1,920) (1,909) (205)
Payments on debt issuance costs (177)   (327)
Proceeds from notes payable 1,718 2,074 1,140
Borrowings under term loan facility and line of credit 20,000   24,000
Repayments under term loan facility and line of credit (13,000) (13,000) (42,000)
Principal payments on finance leases (1,054) (545) (549)
Proceeds from stock option exercise 274 1,924 1,082
Proceeds from sales of common stock under employee stock purchase plan 3,036 2,655 2,224
Cash used to pay taxes on stock grants (992) (3,117) (2,946)
Restricted Stock Award and Units   (1) 1
Net cash provided by (used in) financing activities 8,358 (18,534) (19,013)
Net increase (decrease) in cash, cash equivalents and restricted cash 8,264 (17,184) 22,953
Cash, cash equivalents and restricted cash at beginning of period 11,221 28,405 5,452
Cash, cash equivalents and restricted cash at end of period 19,485 11,221 28,405
Cash paid (received) during the period for:      
Interest 5,066 3,545 5,031
Income taxes (1,120) (1,616) 174
Supplemental disclosures of noncash investing and financing activities:      
(Gain) loss on cash flow hedge valuations, net of tax 38 450 (92)
Other working capital adjustment     1,179
Equipment acquired under finance leases $ 2,451 $ 1,376 $ 467