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Net Loss Per Share (Details)		3 Months Ended		6 Months Ended
	Dec. 23, 2019	Jun. 28, 2020 shares	Jun. 30, 2019 shares	Jun. 28, 2020 shares	Jun. 30, 2019 shares	May 29, 2018 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Reverse stock split description		1-for-14		1-for-14
Reverse stock split ratio	0.0714			0.0714
Common stock | Maximum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Warrants to purchase aggregate shares of common stock						386,100
2009 Stock Plans
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock (in shares)		626,178	571,970	626,178	571,970

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- Definition

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.

+ References

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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