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Business Combinations - Schedule of Provisional Fair Value of Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Mar. 29, 2026 | Dec. 28, 2025 | Sep. 24, 2025 | Dec. 29, 2024
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SunPower Businesses Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Cash and cash equivalents |  |  | $ 1,000 |  |
Accounts receivable |  |  | 16,614 |  |
Contract assets |  |  |  |  |
Inventories |  |  | 48,388 |  |
Prepaid expenses and other current assets |  |  | 2,219 |  |
Property and equipment, net |  |  | 5,867 |  |
Operating lease right-of-use assets |  |  | 2,506 |  |
Other noncurrent assets |  |  | 541 |  |
Intangibles |  |  | 15,894 |  |
Deferred revenue |  |  | (7,361) |  |
Accounts payable |  |  | (5,270) |  |
Accrued expenses and other current liabilities |  |  | (13,955) |  |
Operating lease liabilities, noncurrent |  |  | (2,963) |  |
Other long-term liabilities |  |  | (8,980) |  |
Fair value of net assets acquired |  |  | 54,500 |  |
Goodwill recognized |  |  |  |  |
Consideration transferred |  |  | 54,500 |  |
Total |  |  | 15,894 |  |
SunPower Businesses Acquisition [Member] | Trademark – Blue Raven Solar [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | $ 7,094 |  |
Total |  |  | 10 years |  |
SunPower Businesses Acquisition [Member] | Trademark - SunPower [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | $ 4,300 |  |
Total |  |  | 10 years |  |
SunPower Businesses Acquisition [Member] | Developed technology - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | $ 4,500 |  |
Total |  |  | 3 years |  |
Sunder Energy LLC Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Consideration transferred |  | $ 57,789 |  |  |
Sunder Energy LLC Acquisition [Member] | Developed technology - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 2 years |  |
Sunder Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 10 years |  |
Sunder Energy LLC Acquisition [Member] | Trademark - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 10 years |  |
Ambia Energy LLC Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Consideration transferred |  | $ 33,372 |  |  |
Total |  |  | $ 4,300 |  |
Ambia Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 3,400 |  |
Ambia Energy LLC Acquisition [Member] | Trademarks - Ambia [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 900 |  |
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Cash and cash equivalents |  |  |  |  | $ 1,000
Accounts receivable |  |  |  |  | 11,999
Contract assets |  |  |  |  | 4,615
Inventories |  |  |  |  | 27,706
Prepaid expenses and other current assets |  |  |  |  | 2,219
Property and equipment, net |  |  |  |  | 5,867
Operating lease right-of-use assets |  |  |  |  | 2,506
Other noncurrent assets |  |  |  |  | 541
Intangibles |  |  |  |  | 18,100
Deferred revenue |  |  |  |  | (7,361)
Accounts payable |  |  |  |  | (5,270)
Accrued expenses and other current liabilities |  |  |  |  | (13,955)
Operating lease liabilities, noncurrent |  |  |  |  | (2,963)
Other long-term liabilities |  |  |  |  | (8,980)
Fair value of net assets acquired |  |  |  |  | 36,024
Goodwill recognized |  |  |  |  | 18,476
Consideration transferred |  |  |  |  | 54,500
Total |  |  |  |  | 18,100
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] | Trademark – Blue Raven Solar [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  |  |  | 8,400
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] | Trademark - SunPower [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  |  |  | 5,200
Provisional fair values [Member] | SunPower Businesses Acquisition [Member] | Developed technology - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  |  |  | $ 4,500
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Accounts receivable |  |  | 797 | $ 257 |
Prepaid expenses and other current assets |  |  | 3,039 | 387 |
Property and equipment, net |  |  | 241 | 241 |
Operating lease right-of-use assets |  |  | 313 | 313 |
Other noncurrent assets |  |  | 135 | 552 |
Intangibles |  |  | 37,500 | 25,922 |
Contract liabilities |  |  | (11,673) | (11,073) |
Accounts payable |  |  | (203) | (184) |
Accrued expenses and other current liabilities |  |  | (3,850) | (1,322) |
Operating lease liabilities, noncurrent |  |  | (332) | (215) |
Fair value of net assets acquired |  |  | 25,967 | 14,878 |
Goodwill recognized |  |  | 31,822 | 42,911 |
Consideration transferred |  |  | 57,789 | 57,789 |
Total |  |  | 37,500 | 25,922 |
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] | Developed technology - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 800 | 14,216 |
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 30,600 | 9,279 |
Provisional fair values [Member] | Sunder Energy LLC Acquisition [Member] | Trademark - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 6,100 | $ 2,427 |
Provisional fair values [Member] | Ambia Energy LLC Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Cash and cash equivalents |  |  | 1,350 |  |
Accounts receivable |  |  | 1,368 |  |
Contract assets - unbilled receivables |  |  | 1,143 |  |
Prepaid expenses and other current assets |  |  | 797 |  |
Property and equipment, net |  |  | 2,230 |  |
Intangible assets |  |  | 4,300 |  |
Operating lease right-of-use assets |  |  | 2,563 |  |
Other noncurrent assets |  |  | 182 |  |
Contract liabilities |  |  | (1,675) |  |
Accounts payable |  |  | (2,806) |  |
Accrued expenses and other current liabilities |  |  | (2,917) |  |
Operating lease liabilities, noncurrent |  |  | (2,702) |  |
Finance lease liabilities |  |  | (1,269) |  |
Fair value of net assets acquired |  |  | 2,564 |  |
Fair value of common stock issued (classified within Additional paid-in-capital) |  |  | 16,493 |  |
Goodwill recognized |  |  | 30,808 |  |
Consideration transferred |  |  | 33,372 |  |
Fair value of Deferred Ambia Consideration Shares (Accrued expenses and other current liabilities) |  |  | 16,879 |  |
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Cash and cash equivalents |  |  |  |  |
Accounts receivable |  |  | 4,615 |  |
Contract assets |  |  | (4,615) |  |
Inventories |  |  | 20,682 |  |
Prepaid expenses and other current assets |  |  |  |  |
Property and equipment, net |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |
Other noncurrent assets |  |  |  |  |
Intangibles |  |  | (2,206) |  |
Deferred revenue |  |  |  |  |
Accounts payable |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  |
Operating lease liabilities, noncurrent |  |  |  |  |
Other long-term liabilities |  |  |  |  |
Fair value of net assets acquired |  |  | 18,476 |  |
Goodwill recognized |  |  | (18,476) |  |
Consideration transferred |  |  |  |  |
Total |  |  | (2,206) |  |
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] | Trademark – Blue Raven Solar [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | (1,306) |  |
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] | Trademark - SunPower [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | (900) |  |
Measurement period adjustments [Member] | SunPower Businesses Acquisition [Member] | Developed technology - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  |  |  |
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Accounts receivable |  |  | 540 |  |
Prepaid expenses and other current assets |  |  | 2,652 |  |
Property and equipment, net |  |  |  |  |
Operating lease right-of-use assets |  |  |  |  |
Other noncurrent assets |  |  | (417) |  |
Intangibles |  |  | 11,578 |  |
Contract liabilities |  |  | (600) |  |
Accounts payable |  |  | (19) |  |
Accrued expenses and other current liabilities |  |  | (2,528) |  |
Operating lease liabilities, noncurrent |  |  | (117) |  |
Fair value of net assets acquired |  |  | 11,089 |  |
Goodwill recognized |  |  | (11,089) |  |
Consideration transferred |  |  |  |  |
Total |  |  | 11,578 |  |
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] | Developed technology - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | (13,416) |  |
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 21,321 |  |
Measurement period adjustments [Member] | Sunder Energy LLC Acquisition [Member] | Trademark - Sunder [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | $ 3,673 |  |
Measurement period adjustments [Member] | Ambia Energy LLC Acquisition [Member] | Customer relationships (Backlog) [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total | [1] |  | 1 year |  |
Measurement period adjustments [Member] | Ambia Energy LLC Acquisition [Member] | Trademarks - Ambia [Member] |  |  |  |  |
Net assets acquired: |  |  |  |  |
Total |  |  | 1 year |  |
[1] | Useful life is based upon customer consumption, expected to occur within one year.

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