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Stock-Based Awards (Tables)

12 Months Ended

Dec. 28, 2019

Stock-Based Awards

Schedule Of Assumptions Used To Calculate Weighted-Average Grant Date Fair Value Of Common Stock Options Granted

		Year Ended
		December 28,			December 29,
		2019			2018
Expected term (in years)			6.06			6.20
Expected volatility			108	%		108	%
Risk-free interest rate			1.92	%		2.75	%
Expected dividends		$	—		$	—
Weighted-average grant date fair value per share		$	0.29		$	0.21

Schedule Of Common Stock Options Activity

								Weighted-
								Average
					Weighted-			Remaining			Aggregate
		Number of			Average			Contractual			Intrinsic
		Shares			Exercise			Life			Value
		(in thousands)			Price			(in years)			(in thousands)
Outstanding at December 29, 2018			8,186		$	1.18			5.88		$	223
Granted			790		$	0.35
Exercised			(175)		$	0.28
Expired or forfeited			(1,444)		$	0.89
Outstanding at December 28, 2019			7,357		$	1.17			5.54		$	127
Exercisable at December 28, 2019			5,799		$	1.37			4.69		$	49
Vested and expected to vest at December 28, 2019			7,097		$	1.20			5.41		$	114

Schedule Of Restricted Stock Awards

					Weighted-
					Average
		Number of			Grant-Date
		Shares			Fair Value
		(in thousands)			per Share
Balance nonvested at December 29, 2018			525		$	0.25
Granted			3,727		$	0.55
Vested			(1,012)		$	0.47
Forfeited			(174)		$	0.54
Balance nonvested at December 28, 2019			3,066		$	0.52

Schedule of Stock-Based Compensation Expense

The following table summarizes the stock-based compensation expense by line item in the consolidated statements of operations (in thousands):

		Year Ended
		December 28,			December 29,
		2019			2018
Cost of sales		$	26		$	26
Research and development			213			236
Selling, general and administrative			750			475
Total		$	989		$	737

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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