Stock Based Compensation (Tables)

3 Months Ended

Apr. 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 three months ended April 4, 2015:

	Number of Shares			WeightedAverageExercise PricePer Share		Aggregate Intrinsic Value (thousands)
Outstanding as of January 3, 2015		833,795		$	4.88
Granted		78,300		$	10.73
Exercised		(126,119	)	$	3.86
Canceled or forfeited		(7,000	)	$	3.35
Outstanding as of April 4, 2015		778,976		$	5.65	$	3,939

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
	April 4,2015			March 29,2014
Average risk free interest rate		1.21	%		1.49	%
Expected life (in years)		4.55 years			4.50 years
Dividend yield		—	%		—	%
Average volatility		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 three months ended April 4, 2015 and March 29, 2014:

	Three Months Ended
	April 4,2015		March 29,2014
Cost of revenues	$	67	$	34
Research and development		79		22
Sales and marketing		59		32
General and administrative		128		156
Total	$	333	$	244

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 three months ended April 4, 2015 and March 29, 2014, the amount related to stock-based compensation was not material.  

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

	Number ofShares		Weighted  AverageExercise Price		Weighted  AverageRemaining  ContractualLife (Years)		AggregateIntrinsic Value(thousands)
Options outstanding		778,976	$	5.65		4.56	$	3,939
Options vested and expected to vest		726,823	$	5.49		4.47	$	3,787
Options exercisable		372,022	$	4.15		3.45	$	2,437

Restricted Stock Units and Awards

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

	Number of Shares
Outstanding as of January 3, 2015		277,390
Restricted stock units granted		217,853
Restricted stock units released		(201,200	)
Restricted stock units cancelled		(80,000	)
Outstanding as of April 4, 2015		214,043