Net Loss Per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Mar. 30, 2019

Earnings Per Share [Abstract]

Schedule of basic and diluted net loss per common share

Basic and diluted net loss per common share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been antidilutive.

(in thousands, except share and per share amounts)	Three Months Ended
	March 30, 2019			March 31, 2018
Numerator:
Net loss attributable to common stockholders	$	(6,649	)	$	(5,696	)
Denominator:
Weighted average common shares outstanding—basic	6,974,301			5,793,801
Dilutive effect of stock equivalents resulting from stock options, common stock warrants, preferred stock warrants and convertible preferred stock (as converted)	—			—
Weighted average common shares outstanding—diluted	6,974,301			5,793,801
Net loss per common share—basic and diluted	$	(0.95	)	$	(0.98	)

Schedule of antidilutive securities excluded from computation of earnings per share

The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because the impact of including them would have been antidilutive:

	March 30, 2019	March 31, 2018
Convertible preferred stock (as converted)	41,562,111	39,474,156
Preferred stock warrants (as converted to common stock warrants and subsequently exercised)	160,767	160,767
Common stock warrants (as exercised)	60,002	—
Total	41,782,880	39,634,923