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Leases - Weighted Average (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Leases [Abstract]
Operating lease liabilities arising from obtaining right-of-use assets	$ 0.2	$ 0.5
Finance lease liabilities arising from obtaining right-of-use assets	$ 0.0	$ 0.4
Weighted-average remaining lease term (in years):
Operating leases	5 years 3 months 10 days	5 years 8 months 26 days
Finance leases	17 years 5 months 8 days	18 years 8 months 1 day
Weighted-average discount rate:
Operating leases	6.50%	6.50%
Finance leases	6.52%	6.52%

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- Definition

Weighted Average Discount Rate, Percent [Abstract]

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Weighted Average Remaining Lease Term [Abstract]

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Weighted average discount rate for finance lease calculated at point in time.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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