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Income taxes (Tables) | 12 Months Ended
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May 25, 2025
Income Tax Disclosure [Abstract] |
Schedule of Benefits and Provisions for Income Taxes | The following table presents the components of the provision for income taxes from continuing operations:
| Year ended
| May 25, 2025 |  | May 26, 2024
Current: |  |  |
Federal | $ | 14 |  |  | $ | (10) |
State | 148 |  |  | 37 |
Total | 162 |  |  | 27 |
Deferred: |  |  |
Federal | (124) |  |  | 173 |
State | 5 |  |  | (17) |
Total | (119) |  |  | 156 |
Income tax provision | $ | 43 |  |  | $ | 183 |
Schedule of Provision (Benefit) for Income Taxes | Income tax expense differs from the amount calculated using the 21% statutory U.S. federal income tax rate as follows:
| Year ended
| May 25, 2025 |  | May 26, 2024
Tax at U.S. statutory rate | $ | (8,122) |  |  | $ | 1,998 |
State income taxes, net of federal benefit | (197) |  |  | 52 |
Compensation-related activity | 799 |  |  | 418 |
Return to provision adjustments | 213 |  |  | 3,136 |
Deferred tax write-offs | (748) |  |  | 711 |
Tax credit carryforwards | (539) |  |  | (518) |
Other | 96 |  |  | 158 |
Change in valuation allowance | 8,541 |  |  | (5,772) |
Income tax expense | $ | 43 |  |  | $ | 183 |
Schedule of Deferred Tax Assets and Liabilities | The following table presents the components of deferred tax assets and liabilities reported in the balance sheets:
| Year ended
| May 25, 2025 |  | May 26, 2024
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ | 40,677 |  |  | $ | 40,806 |
Limitations on business interest expense | 15,573 |  |  | 11,783 |
Research credit carryforwards | 7,116 |  |  | 6,700 |
Capitalized research and development | 3,767 |  |  | 2,916 |
Other | 6,338 |  |  | 4,609 |
Deferred tax assets before valuation allowance | 73,471 |  |  | 66,814 |
Less: valuation allowance | (54,714) |  |  | (46,173) |
Deferred tax assets | 18,757 |  |  | 20,641 |
Deferred tax liabilities: |  |  |
Depreciation | (10,735) |  |  | (11,809) |
Debt derivative liability and related debt discount | (7,026) |  |  | (7,911) |
Other | (1,419) |  |  | (1,464) |
Deferred tax liabilities | (19,180) |  |  | (21,184) |
Net deferred tax liability | $ | (423) |  |  | $ | (543) |
Summary of Operating Loss and Tax Credit Carryforwards | The following table presents the amounts and expiration dates of net operating loss and tax credit carryforwards as of May 25, 2025:
| Net operating loss carryforwards |  | Research and development credits
| Amount |  | Begin to expire |  | Amount |  | Life |  | Begin to expire
Federal | $ | 172,048 |  |  | 2028 |  | $ | 3,858 |  |  | 20 years |  | 2033
California | 52,239 |  |  | 2025 |  | 2,058 |  |  | unlimited |  | none
All other states | 16,512 |  |  | 2025 |  | 2,024 |  |  | 15 years |  | 2029

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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- Definition Tabular disclosure of pertinent information, such as tax authority, amounts, and expiration dates, of net operating loss carryforwards, including an assessment of the likelihood of utilization. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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