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Stockholders' Equity and Stock-Based Compensation (Tables)

6 Months Ended

Jun. 27, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

The following table shows stock-based compensation expenses included in the condensed consolidated statements of operations for the three and six months ended June 27, 2020 and June 29, 2019:

	Three Months Ended				Six Months Ended
(in thousands)	June 27, 2020		June 29, 2019		June 27, 2020			June 29, 2019
Cost of revenues	$	35	$	10	$	59		$	29
Research and development		24		62		(7	)		165
Sales and marketing		134		46		173			209
General and administrative		243		507		306			837
	$	436	$	625	$	531		$	1,240

Summary of Stock Options

The following table summarizes stock options information during the six months ended June 27, 2020:

	Number of Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value (thousands)
Outstanding as of December 28, 2019		1,383,552		$	6.11
Granted		78,500		$	2.15
Exercised		—		$	—
Canceled or forfeited		(185,388	)	$	6.95
Outstanding as of June 27, 2020		1,276,664		$	5.74	$	4

Weighted Average Assumptions for Fair Value Estimate of Stock-Based Awards (Options)

The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock-based awards (options) with the following weighted average assumptions:

	Three Months Ended						Six Months Ended
	June 27, 2020			June 29, 2019			June 27, 2020			June 29, 2019
Average risk free interest rate		0.27	%		1.74	%		0.39	%		1.76	%
Expected life (in years)	4.55 years			4.55 years			4.55 years			4.55 years
Dividend yield		—	%		—	%		—	%		—	%
Average volatility		62	%		45	%		59	%		45	%

Summary of Stock Options Outstanding, Vested, Expected to Vest and Exercisable

Information regarding stock options outstanding, vested, expected to vest, and exercisable as of June 27, 2020 is summarized below:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value (thousands)
Options outstanding		1,276,664	$	5.74		5.07	$	4
Options vested and expected to vest		1,127,406	$	5.92		4.95	$	3
Options exercisable		515,816	$	7.42		3.86	$	—

Restricted Stock Units

Information regarding the restricted stock units (“RSUs”) activity for the six months ended June 27, 2020 is summarized below:

	Number of Shares
Outstanding as of December 28, 2019		411,133
Restricted stock units granted		276,327
Restricted stock units released		(73,652	)
Restricted stock units forfeited		(103,785	)
Outstanding as of June 27, 2020		510,023