Provision for Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
Feb. 25, 2023	Feb. 26, 2022	Feb. 27, 2021
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	21.00%
State income tax rate, net of federal impact	2.66%	3.87%	3.94%
Uncertain tax positions	0.00%	2.16%	1.63%
Goodwill non-deductible impairment charges	0.00%	0.00%	0.00%
Tax deficiencies related to stock-based compensation	(0.07%)	(0.81%)	(3.18%)
Tax credits	0.03%	0.38%	0.41%
CARES Act	0.00%	0.94%	35.98%
Valuation Allowance	(18.94%)	(48.01%)	(7.74%)
Canadian Branch Earnings	0.00%	1.60%	0.78%
Loss on Warrant Issuance	(3.80%)	0.00%	0.00%
Other	0.00%	0.47%	2.35%
Total	0.88%	(18.40%)	55.17%

Effective Income Tax Rate Reconciliation, CARES Act

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Effective Income Tax Rate Reconciliation, Foreign Branch Earnings

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Effective Income Tax Rate Reconciliation, Warrant Issuance, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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