Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity under Incentive Plan

The following table summarizes information regarding activity under the Incentive Plan during the six months ended June 30, 2018:

	Number of Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value (thousands)
Outstanding as of December 30, 2017		857,311		$	9.49
Granted		91,800		$	6.10
Exercised		(16,250	)	$	3.80
Canceled or forfeited		(42,538	)	$	10.97
Outstanding as of June 30, 2018		890,323		$	9.17	$	225

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

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

	Three Months Ended						Six Months Ended
	June 30, 2018			July 1, 2017			June 30, 2018			July 1, 2017
Average risk free interest rate		2.65	%		1.70	%		2.60	%		1.75	%
Expected life (in years)	4.55 years			4.55 years			4.55 years			4.55 years
Dividend yield	—%			—%			—%			—%
Average volatility		40	%		43	%		40	%		42	%

Stock-Based Compensation Expense

The following table shows stock-based compensation expense included in the condensed consolidated statements of operations for the three and six months ended June 30, 2018 and July 1, 2017:

	Three Months Ended				Six Months Ended
	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
Cost of revenues	$	21	$	56	$	45	$	92
Research and development		60		67		120		111
Sales and marketing		83		106		179		179
General and administrative		251		215		499		454
	$	415	$	444	$	843	$	836

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 30, 2018 is summarized below:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)		Aggregate IntrinsicValue (thousands)
Options outstanding		890,323	$	9.17		5.10	$	225
Options vested and expected to vest		826,224	$	9.17		5.03	$	214
Options exercisable		284,733	$	8.72		3.30	$	147

Restricted Stock Units and Awards

Information regarding the restricted stock units (“RSUs”) activity for the six months ended June 30, 2018 is summarized below:

	Number of Shares
Outstanding as of December 30, 2017		361,148
Restricted stock units granted		36,750
Restricted stock units released		(66,377	)
Restricted stock units forfeited		(2,750	)
Outstanding as of June 30, 2018		328,771

Information regarding the RSUs granted with performance conditions activity for the six months ended June 30, 2018 is summarized below:

	Number of Shares
Outstanding as of December 30, 2017		4,301
Restricted stock awards granted		—
Restricted stock awards released		(4,301	)
Outstanding as of June 30, 2018		-