XML 57 R23.htm IDEA: XBRL DOCUMENT
v3.24.0.1

ORGANIZATION AND OPERATIONS OF THE COMPANY (Tables) | 12 Months Ended
--- | ---
Dec. 29, 2023
ORGANIZATION AND OPERATIONS OF THE COMPANY |
Schedule of Contracts by Reportable Segments and Type of Contracts | ​
Segment | Contract Type | Revenue Recognition Method
​ | Time-and-materials | Time-and-materials
Energy | Unit-based | Unit-based
​ | Software license | Unit-based
​ | Fixed price | Percentage-of-completion
​ | Time-and-materials | Time-and-materials
Engineering and Consulting | Unit-based | Unit-based
​ | Fixed price | Percentage-of-completion
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 29, | ​ | December 30,
​ | ​ | 2023 |  | 2022
​ | ​ | (in thousands)
Furniture and fixtures | ​ | $ | 4,379 | ​ | $ | 4,062
Computer hardware and software | ​ |  | 44,594 | ​ |  | 35,635
Leasehold improvements | ​ |  | 3,382 | ​ |  | 3,097
Equipment under finance leases | ​ |  | 6,139 | ​ |  | 5,503
Automobiles, trucks, and field equipment | ​ |  | 3,373 | ​ |  | 3,134
Subtotal | ​ |  | 61,867 | ​ |  | 51,431
Accumulated depreciation and amortization | ​ |  | (34,770) | ​ |  | (28,894)
Equipment and leasehold improvements, net | ​ | $ | 27,097 | ​ | $ | 22,537

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of contracts for revenue generating activities by type and by reporting segment. + References No definition available. + Details
Name: | wldn_ScheduleOfByTypeAndReportableSegmentTableTextBlock
Namespace Prefix: | wldn_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration