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Computation of Basic and Diluted Net Loss Per Common Share - Reconciliation of Numerator and Denominator of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Numerator:
Net loss	$ (8,813)	$ (12,813)
Denominator:
Weighted average shares of common stock (basic)	13,707	12,199
Weighted average shares of common stock (diluted)	13,707	12,199
Per share data:
Basic net (loss) income per share	$ (0.64)	$ (1.05)
Diluted net (loss) income per share	$ (0.64)	$ (1.05)

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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