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Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (787)	$ (6,719)
Weighted-average shares outstanding - basic (in shares)	9,366	9,337
Dilutive effect of share-based awards (in shares)	0	0
Weighted-average shares outstanding - diluted (in shares)	9,366	9,337
Basic loss per share (in dollars per share)	$ (0.08)	$ (0.72)
Diluted loss per share (in dollars per share)	$ (0.08)	$ (0.72)

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