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SEGMENT AND GEOGRAPHICAL INFORMATION - Concentration Risk (Details) | 3 Months Ended
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Mar. 31, 2023 | Apr. 01, 2022
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Top Ten Customers |  |
Concentration Risk |  |
Concentration risk (as a percent) | 52.20% | 54.20%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Los Angeles Department of Water and Power |  |
Concentration Risk |  |
Concentration risk (as a percent) | 11.10% | 17.10%
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | California |  |
Concentration Risk |  |
Concentration risk (as a percent) | 42.40% | 43.60%
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | New York |  |
Concentration Risk |  |
Concentration risk (as a percent) | 24.50% | 19.00%
Revenue from Contract with Customer, Segment Benchmark | Customer Concentration Risk | Los Angeles Department of Water and Power | Energy |  |
Concentration Risk |  |
Concentration risk (as a percent) | 13.70% |
Revenue from Contract with Customer, Segment Benchmark | Customer Concentration Risk | Los Angeles Department of Water and Power, and Duke Energy | Energy |  |
Concentration Risk |  |
Concentration risk (as a percent) |  | 32.10%

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