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SUPPLEMENTAL FINANCIAL STATEMENT DATA (Tables) | 12 Months Ended
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Dec. 27, 2024
SUPPLEMENTAL FINANCIAL STATEMENT DATA |
Schedule of reconciliation of cash and cash equivalents, and restricted cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 27, | ​ | December 29, | ​ | December 30,
​ |  | 2024 |  | 2023 |  | 2022
​ | ​ | (in thousands)
Cash and cash equivalents | ​ | $ | 74,158 | ​ | $ | 23,397 | ​ | $ | 8,806
Restricted cash | ​ |  | — | ​ |  | — | ​ |  | 10,679
Total cash, cash equivalents, and restricted cash shown in the consolidated statement of cash flows | ​ | $ | 74,158 | ​ | $ | 23,397 | ​ | $ | 19,485
Schedule of accounts receivable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 27, | ​ | December 29,
​ |  | 2024 |  | 2023
​ | ​ | (in thousands)
Billed | ​ | $ | 66,870 | ​ | $ | 70,543
Allowance for doubtful accounts | ​ | ​ | (1,313) | ​ | ​ | (866)
Accounts receivable, net | ​ | $ | 65,557 | ​ | $ | 69,677
Schedule of the movements in the allowance for doubtful accounts | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fiscal Year
​ |  | 2024 |  | 2023 |  | 2022
​ | ​ | (in thousands)
Balance as of the beginning of the year | ​ | $ | 866 | ​ | $ | 640 | ​ | $ | 1,115
(Recovery of) provision for doubtful accounts | ​ |  | 740 | ​ |  | 826 | ​ |  | 243
Write-offs of uncollectible accounts | ​ |  | (303) | ​ |  | (600) | ​ |  | (718)
Fair value adjustment | ​ |  | 10 | ​ |  | — | ​ |  | —
Balance as of the end of the year | ​ | $ | 1,313 | ​ | $ | 866 | ​ | $ | 640
Schedule of contract assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 27, | ​ | December 29,
​ |  | 2024 |  | 2023
​ | ​ | (in thousands)
Unbilled short-term | ​ | $ | 66,518 | ​ | $ | 79,585
Contract retentions | ​ | ​ | 22,010 | ​ | ​ | 14,300
Contract assets | ​ | ​ | 88,528 | ​ | ​ | 93,885
Unbilled long-term (1) | ​ | ​ | — | ​ | ​ | 2,849
Total contract assets | ​ | $ | 88,528 | ​ | $ | 96,734
| (1) | Included in Other assets in the consolidated financial statements.
Schedule of equipment and leasehold improvements | ​
​ | ​ | ​ | ​
Category |  | Estimated Useful Life
Furniture and fixtures |  | 5 | years
Computer hardware |  | 3 | years
Computer software |  | 3 | years
Automobiles and trucks |  | 3 | years
Field equipment |  | 5 | years
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 27, | ​ | December 29,
​ | ​ | 2024 |  | 2023
​ | ​ | (in thousands)
Furniture and fixtures | ​ | $ | 4,594 | ​ | $ | 4,379
Computer hardware and software | ​ |  | 51,904 | ​ |  | 44,594
Leasehold improvements | ​ |  | 3,804 | ​ |  | 3,382
Equipment under finance leases | ​ |  | 7,052 | ​ |  | 6,139
Automobiles, trucks, and field equipment | ​ |  | 3,608 | ​ |  | 3,373
Subtotal | ​ |  | 70,962 | ​ |  | 61,867
Accumulated depreciation and amortization | ​ |  | (41,428) | ​ |  | (34,770)
Equipment and leasehold improvements, net | ​ | $ | 29,534 | ​ | $ | 27,097
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 27, | ​ | December 29,
​ |  | 2024 |  | 2023
​ | ​ | (in thousands)
Accrued subcontractor costs | ​ | $ | 33,061 | ​ | $ | 30,196
Accrued bonuses | ​ | ​ | 18,277 | ​ | ​ | 14,423
Employee withholdings | ​ |  | 3,664 | ​ |  | 3,123
Compensation and payroll taxes | ​ |  | 3,564 | ​ |  | 3,125
Rebate and other | ​ | ​ | 360 | ​ | ​ | 139
Accrued accounting costs and taxes | ​ |  | 3,850 | ​ |  | 3,123
Total accrued liabilities | ​ | $ | 62,776 | ​ | $ | 54,129

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