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STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Jan. 01, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of impact on results of operations of recording stock-based compensation expense

The impact on the Company's results of operations of recording stock-based compensation expense for fiscal years 2016, 2015, and 2014 was as follows (in thousands):

	Fiscal Years
	2016				2015				2014
Cost of revenue	$	132			$	109			$	137
Research and development	658				826				924
Selling, general and administrative	794				1,064				1,181
Restructuring costs (1)	—				29				—
Total costs and expenses	$	1,584			$	2,028			$	2,242

⁽¹⁾Stock-based compensation related to restructuring plan initiated in the second quarter of fiscal year 2015.

No stock-based compensation was capitalized during any period presented above.

Schedule of weighted average assumptions included in estimated fair value calculations for stock option grants

The following weighted average assumptions are included in the estimated fair value calculations for stock option grants:

	Fiscal Years
	2016			2015			2014
Expected term (years)	7.1			6.3			6.6
Risk-free interest rate	1.40	%		1.75	%		1.98	%
Expected volatility	52	%		56	%		58	%
Expected dividend	—			—			—

Schedule of shares available for grant

The following table summarizes the shares available for grant under the 2009 Plan :

	Shares Available for Grant
	(in thousands)
Balance at January 3, 2016	2,929
Authorized	—
Options granted	(842	)
Options forfeited or expired	1,129
RSUs granted	(1,629	)
RSUs forfeited	789
PRSUs granted	(193	)
PRSU's forfeited or expired	449
Balance at January 1, 2017	2,632

Schedule of stock options outstanding and stock option activity and related weighted average exercise price

The following table summarizes stock options outstanding and stock option activity under the 2009 Plan, and the related weighted average exercise price, for 2016, 2015 and 2014:

	Number of Shares			Weighted Average Exercise Price				Weighted Average Remaining Term		Aggregate Intrinsic Value
	(in thousands)							(in years)		(in thousands)
Balance outstanding at December 29, 2013	7,242			$	2.62
Granted	428			3.51
Forfeited or expired	(219	)		3.56
Exercised	(1,769	)		2.57
Balance outstanding at December 28, 2014	5,682			2.67
Granted	225			1.64
Forfeited or expired	(521	)		2.87
Exercised	(120	)		0.98
Balance outstanding at January 3, 2016	5,266			2.64
Granted	842			0.86
Forfeited or expired	(1,129	)		2.61
Exercised	—			—
Balance outstanding at January 1, 2017	4,979			$	2.35			4.06		$	586
Exercisable at January 1, 2017	4,078			$	2.59			2.90		$	199
Vested and expected to vest at January 1, 2017	4,740			$	2.41			3.78		$	473

Schedule of significant price ranges of options outstanding, related weighted average exercise prices and contractual life information

Significant exercise price ranges of options outstanding, related weighted average exercise prices and contractual life information at the end of 2016 were as follows:

	Options Outstanding									Options Exercisable
Range of Exercise Prices	Options Outstanding			Weighted Average Remaining Contractual Life		Weighted Average Exercise Price				Options Vested and Exercisable			Weighted Average Exercise Price
	(in thousands)			(in years)						(in thousands)
$0.78 - $0.78	4			2.17		$	0.78			5			$	0.78
0.86 - 0.86	726			9.68		0.86				—			—
0.90 - 1.32	463			2.62		0.96				414			0.92
1.63 - 1.63	731			1.92		1.63				731			1.63
2.17 - 2.76	446			4.04		2.29				446			2.29
2.78 - 2.78	1,299			3.08		2.78				1,299			2.78
2.82 - 3.39	635			5.20		3.29				530			3.28
3.48 - 3.82	185			5.63		3.60				164			3.57
3.92 - 3.92	2			4.28		3.92				1			3.92
4.17 - 4.17	488			0.79		4.17				488			4.17
$0.78 - $4.17	4,979			4.06		$	2.35			4,078			$	2.59

Schedule of share-based compensation related to RSU

The stock-based compensation related to grants of vested RSUs was $953,000, $834,000, $854,000 in 2016, 2015 and 2014, respectively. In 2016, the Company cancelled PSU's issued to certain officers, which resulted in a credit of $113,000 to the stock-based compensation.

	RSUs & PRSUs Outstanding
	Number of Shares			Weighted Average Grant Date Fair Value
	(in thousands)
Nonvested at December 29, 2013	225			$	3.17
Granted	947			3.74
Vested	(480	)		3.86
Forfeited	(42	)		—
Nonvested at December 28, 2014	650			3.47
Granted	1,128			1.46
Vested	(221	)		1.42
Forfeited	(122	)		—
Nonvested at January 3, 2016	1,435			2.30
Granted	1,822			0.97
Vested	(649	)		1.07
Forfeited	(1,238	)		—
Nonvested at January 1, 2017	1,370			$	1.68

Schedule of weighted average assumptions

The fair value of rights issued pursuant to the Company's ESPP was estimated on the commencement date of each offering period using the following weighted average assumptions:

	Fiscal Years
	2016			2015			2014
Expected life (months)	6.1			6.0			6.0
Risk-free interest rate	0.97	%		0.21	%		0.07	%
Volatility	59.3	%		55	%		49	%
Dividend yield	—			—			—

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Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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