Stock Based Compensation (Tables)

6 Months Ended

Jul. 04, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity in Stock Option Plan

The following table summarizes information regarding activity in our stock option plan during the six months ended July 4, 2015:

	Number of Shares			WeightedAverageExercise PricePer Share		Aggregate Intrinsic Value (thousands)
Outstanding as of January 3, 2015		833,795		$	4.88
Granted		95,700		$	10.62
Exercised		(167,189	)	$	3.68
Canceled or forfeited		(18,351	)	$	5.98
Outstanding as of July 4, 2015		743,955		$	5.86	$	2,048

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 4,2015			June 28,2014			July 4,2015			June 28,2014
Average risk free interest rate		1.51	%		1.45	%		1.27	%		1.48	%
Expected life (in years)		4.55 years			4.5 years			4.55 years			4.5 years
Dividend yield		—	%		—	%		—	%		—	%
Average volatility		51	%		55	%		51	%		57	%

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 4, 2015 and June 28, 2014:

	Three Months Ended				Six Months Ended
	July 4,2015		June 28,2014		July 4,2015		June 28,2014
Cost of revenues	$	56	$	39	$	123	$	73
Research and development		53		26		132		48
Sales and marketing		45		28		104		60
General and administrative		75		141		203		297
	$	229	$	234	$	562	$	478

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

Occasionally, the Company will grant stock-based instruments to non-employees. During the six months ended July 4, 2015 and June 28, 2014, the amount of stock-based compensation related to non-employee options was not material.  

Information regarding stock options outstanding, vested and expected to vest and exercisable as of July 4, 2015 is summarized below:

	Number ofShares		Weighted  AverageExercise Price		Weighted  AverageRemaining  ContractualLife (Years)		AggregateIntrinsic Value(thousands)
Options outstanding		743,955	$	5.86		4.43	$	2,048
Options vested and expected to vest		699,259	$	5.72		4.35	$	2,000
Options exercisable		384,668	$	4.54		3.48	$	1,453

Restricted Stock Units and Awards

Information regarding the restricted stock units activity for the six months ended July 4, 2015 is summarized below:

	Number of Shares
Outstanding as of January 3, 2015		277,390
Restricted stock units granted		225,392
Restricted stock units released		(207,340	)
Restricted stock units cancelled		(80,000	)
Outstanding as of July 4, 2015		215,442

Information regarding the restricted stock awards activity for the six months ended July 4, 2015 is summarized below:

	Number of Shares
Outstanding as of January 3, 2015		2,445
Restricted stock awards granted		2,513
Restricted stock awards released		(2,445	)
Outstanding as of July 4, 2015		2,513