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Fair Value Measurements, Installment Loan (Details) - USD ($) $ in Thousands	Jun. 27, 2017	Dec. 27, 2016
Carrying Amount
Carrying amount and Fair value of financial instruments
Installment loan	$ 472	$ 550
Fair Value | Level 2
Carrying amount and Fair value of financial instruments
Installment loan	$ 550	$ 599

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- Definition

Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.

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