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(Loss) Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Earnings Per Share [Abstract]
Net income	$ (13,427)	$ 584
Basic weighted shares outstanding (in shares)	9,137,000	8,966,000
Dilutive effect of share-based awards (in shares)	0	132,000
Diluted weighted average shares outstanding (in shares)	9,137,000	9,098,000
Basic (loss) earnings per share (in dollars per share)	$ (1.47)	$ 0.07
Diluted (loss) earnings per share (in dollars per share)	$ (1.47)	$ 0.06
Restricted Stock and Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive common stock equivalents excluded from diluted earnings per share calculation		50,000

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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