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. 29, 2018	Dec. 30, 2017
Numerator:
Net loss	$ (12,813)	$ (12,867)
Denominator:
Weighted average shares of common stock (basic)	12,199	11,555
Weighted average shares of common stock (diluted)	12,199	11,555
Per share data:
Basic net (loss) income per share	$ (1.05)	$ (1.11)
Diluted net (loss) income per share	$ (1.05)	$ (1.11)