Stock Based Compensation (Tables)

6 Months Ended

Jul. 01, 2017

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 July 1, 2017:

	Number of Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value (thousands)
Outstanding as of December 31, 2016		470,985		$	8.69
Granted		65,900		$	13.15
Exercised		(40,371	)	$	5.34
Canceled or forfeited		(27,198	)	$	10.40
Outstanding as of July 1, 2017		469,316		$	9.51	$	768

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
	July 1, 2017			July 2, 2016			July 1, 2017			July 2, 2016
Average risk free interest rate		1.70	%		1.10	%		1.75	%		1.16	%
Expected life (in years)	4.55 years			4.55 years			4.55 years			4.55 years
Dividend yield	—%			—%			—%			—%
Average volatility		43	%		46	%		42	%		47	%

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 July 1, 2017 and July 2, 2016:

	Three Months Ended				Six Months Ended
	July 1, 2017		July 2, 2016		July 1, 2017		July 2, 2016
Cost of revenues	$	56	$	30	$	92	$	81
Research and development		67		19		111		51
Sales and marketing		106		41		179		81
General and administrative		215		488		454		587
	$	444	$	578	$	836	$	800

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

Information regarding stock options outstanding, vested and expected to vest and exercisable as of July 1, 2017 is summarized below:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)		Aggregate IntrinsicValue (thousands)
Options outstanding		469,316	$	9.51		4.49	$	768
Options vested and expected to vest		469,316	$	9.51		4.49	$	768
Options exercisable		253,475	$	7.51		3.47	$	673

Restricted Stock Units and Awards

Information regarding the restricted stock units (“RSUs”) activity for the six months ended July 1, 2017 is summarized below:

	Number of Shares
Outstanding as of December 31, 2016		335,805
Restricted stock units granted		55,891
Restricted stock units released		(59,905	)
Restricted stock units forfeited		(27,789	)
Outstanding as of July 1, 2017		304,002

Information regarding the RSUs granted with performance conditions activity for the six months ended July 1, 2017 is summarized below:

	Number of Shares
Outstanding as of December 31, 2016		1,289
Restricted stock awards granted		4,301
Restricted stock awards released		(1,289	)
Outstanding as of July 1, 2017		4,301