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Stock-Based Awards (Tables) | 12 Months Ended
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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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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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