Stockholders' Equity - Summary of Activity in Stock Option Plan (Details) - $ / shares	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Outstanding, Number of Shares, Beginning Balance	857,311	470,985
Number of Shares, Options granted	178,435	524,400
Number of Shares, Options exercised	(24,050)	(64,380)
Number of Shares, Options cancelled or forfeited	(166,798)	(73,694)
Number of Shares, Ending Balance	844,898	857,311
Weighted Average Exercise Price, Beginning Balance	$ 9.49	$ 8.69
Weighted Average Exercise Price, Options granted	6.00	9.90
Weighted Average Exercise Price, Options exercised	4.09	5.86
Weighted Average Exercise Price, Options cancelled or forfeited	9.85	10.47
Weighted Average Exercise Price, Ending Balance	$ 8.84	$ 9.49

No definition available.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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