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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 28, 2019
Equity [Abstract] |
Share Activity and Total Number of Share Available for Grant | The following table represents the shares activity and the total number of shares available for grant under the Incentive Plan:
|  | Shares Available for Grant |
Balances as of December 30, 2017 |  |  | 196,970 |
Additional shares reserved |  |  | 1,000,000 |
Options granted |  |  | (178,435 | )
Restricted stock granted |  |  | (628,125 | )
Options cancelled |  |  | 166,798 |
Awards cancelled |  |  | 143,754 |
Balances as of December 29, 2018 |  |  | 700,962 |
Additional shares reserved |  |  | 1,000,000 |
Options granted |  |  | (853,650 | )
Restricted stock granted |  |  | (443,036 | )
Options cancelled |  |  | 314,786 |
Awards cancelled |  |  | 388,461 |
Balances as of December 28, 2019 |  |  | 1,107,523 |
Stock-Based Compensation Expenses | The following table shows stock-based compensation expenses by functional area in the consolidated statements of operations for 2019 and 2018 (in thousands):
|  | FY 2019 |  |  | FY 2018 |
|  | Year Ended |  |  | Year Ended |
|  | December 28, 2019 |  |  | December 29, 2018 |
Cost of revenues |  | $ | 75 |  |  | $ | 47 |
Research and development |  |  | 174 |  |  |  | 129 |
Sales and marketing |  |  | 409 |  |  |  | 448 |
General and administrative |  |  | 1,045 |  |  |  | 1,179 |
Total stock-based compensation expense |  | $ | 1,703 |  |  | $ | 1,803 |
Summary of Activity in Stock Option Plan | Summary of Stock Options The following table summarizes information regarding activity in our stock option plans during the fiscal years ended 2019 and 2018 (in thousands except share and per share data):
|  | Outstanding Options |
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Balances as of December 30, 2017 |  |  | 857,311 |  |  | $ | 9.49 |
Options granted |  |  | 178,435 |  |  |  | 6.00 |
Options exercised |  |  | (24,050 | ) |  |  | 4.09 |
Options cancelled or forfeited |  |  | (166,798 | ) |  |  | 9.85 |
Balances as of December 29, 2018 |  |  | 844,898 |  |  | $ | 8.84 |
Options granted |  |  | 853,650 |  |  |  | 4.55 |
Options exercised |  |  | (210 | ) |  |  | 3.49 |
Options cancelled or forfeited |  |  | (314,786 | ) |  |  | 9.20 |
Balances as of December 28, 2019 |  |  | 1,383,552 |  |  | $ | 6.11 |
Stock Options Outstanding and Exercisable | The following table summarizes information with respect to stock options outstanding and exercisable as of December 28, 2019:
|  | Options Outstanding |  |  | Options Vested and Exercisable |
Range of Exercise Prices |  | Number of Shares Outstanding |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Weighted Average Exercise Price |  |  | Number of Shares Exercisable |  |  | Weighted Average Exercise Price |
$1.82 - $4.33 |  |  | 152,950 |  |  |  | 5.96 |  |  | $ | 2.85 |  |  |  | 6,626 |  |  | $ | 4.11 |
$4.60 - $4.85 |  |  | 40,062 |  |  |  | 4.78 |  |  | $ | 4.73 |  |  |  | 15,062 |  |  | $ | 4.74 |
$4.92 - $4.92 |  |  | 600,000 |  |  |  | 6.39 |  |  | $ | 4.92 |  |  |  | — |  |  | $ | — |
$4.98 - $5.88 |  |  | 171,788 |  |  |  | 5.80 |  |  | $ | 5.38 |  |  |  | 49,521 |  |  | $ | 5.55 |
$5.92 - $8.58 |  |  | 141,004 |  |  |  | 2.43 |  |  | $ | 6.97 |  |  |  | 109,348 |  |  | $ | 7.14 |
$8.60 - $9.54 |  |  | 144,750 |  |  |  | 2.47 |  |  | $ | 9.28 |  |  |  | 104,940 |  |  | $ | 9.27 |
$10.14 - $11.16 |  |  | 81,440 |  |  |  | 2.55 |  |  | $ | 10.79 |  |  |  | 74,369 |  |  | $ | 10.76 |
$12.85 - $12.85 |  |  | 15,000 |  |  |  | 3.83 |  |  | $ | 12.85 |  |  |  | 11,875 |  |  | $ | 12.85 |
$14.61 - $14.61 |  |  | 23,438 |  |  |  | 3.61 |  |  | $ | 14.61 |  |  |  | 17,189 |  |  | $ | 14.61 |
$16.29 - $16.29 |  |  | 13,120 |  |  |  | 2.48 |  |  | $ | 16.29 |  |  |  | 12,132 |  |  | $ | 16.29 |
$1.82 - $16.29 |  |  | 1,383,552 |  |  |  | 5.07 |  |  | $ | 6.11 |  |  |  | 401,062 |  |  | $ | 8.80 |
Weighted Average Assumptions for Fair Value of Options Granted | The determination of the fair value of options granted is computed using the Black-Scholes option pricing model with the following weighted average assumptions:
|  | Employee Stock Option Plan |
|  | FY 2019 |  |  | FY 2018 |
Average risk free interest rate |  |  | 1.75 | % |  |  | 2.69 | %
Expected life (in years) |  | 4.55 years |  |  | 4.55 years |
Dividend yield |  |  | — |  |  |  | — |
Average volatility |  |  | 45.6 | % |  |  | 40.9 | %
Stock Options Outstanding, Exercisable and Expected to Vest | Information regarding stock options outstanding, exercisable and expected to vest as of December 28, 2019 is summarized below:
|  | Number of |  |  | Weighted Average |  |  | Weighted Average Remaining Contractual |  |  | Aggregate Intrinsic Value |
|  | Shares |  |  | Exercise Price |  |  | Life (years) |  |  | (thousands) |
Options outstanding |  |  | 1,383,552 |  |  | $ | 6.11 |  |  |  | 5.07 |  |  | $ | 12 |
Options vested and expected to vest |  |  | 1,233,254 |  |  | $ | 6.27 |  |  |  | 4.94 |  |  | $ | 10 |
Options exercisable |  |  | 401,062 |  |  | $ | 8.80 |  |  |  | 2.62 |  |  | $ | — |
Restricted Stock Units Outstanding, Vested and Expected to Vest | Information regarding the restricted stock units outstanding, vested and expected to vest as of December 28, 2019 is summarized below:
|  | Number of Shares |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (thousands) |
Restricted stock units outstanding |  |  | 411,133 |  |  |  | 1.27 |  |  | $ | 966 |
Restricted stock units vested and expected to vest |  |  | 350,639 |  |  |  | 1.21 |  |  | $ | 824 |
Restricted Stock Units and Awards | Information regarding the RSU activity during the years ended December 28, 2019 and December 29, 2018 is summarized below:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding as of December 30, 2017 |  |  | 361,148 |  |  | $ | 10.42 |
Restricted stock units granted |  |  | 418,750 |  |  | $ | 7.79 |
Restricted stock units released |  |  | (86,941 | ) |  | $ | 7.38 |
Restricted stock units forfeited |  |  | (95,836 | ) |  | $ | 10.01 |
Outstanding as of December 29, 2018 |  |  | 597,121 |  |  | $ | 9.08 |
Restricted stock units granted |  |  | 295,357 |  |  | $ | 2.28 |
Restricted stock units released |  |  | (222,371 | ) |  | $ | 4.32 |
Restricted stock units forfeited |  |  | (258,974 | ) |  | $ | 8.41 |
Outstanding as of December 28, 2019 |  |  | 411,133 |  |  | $ | 7.19 |

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