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Stockholders' Equity (Tables) | 12 Months Ended
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Jan. 03, 2015
Equity [Abstract] |
Summary of Activity in Stock Option Plan | The following table summarizes information regarding activity in our stock option plans during the fiscal years ended 2014, 2013 and 2012 (in thousands except share and per share data):
|  |  |  |  | Outstanding Options |
|  | Shares Available for Grant |  |  | Number of Shares |  |  | Aggregate Price |  |  | Weighted Average Exercise Price |
Balances as of December 31, 2011 |  |  | 505,221 |  |  |  | 1,766,401 |  |  | $ | 6,380 |  |  | $ | 3.61 |
Additional shares reserved |  |  | 391,166 |  |  |  | — |  |  |  | — |  |  |  | — |
Options granted |  |  | (335,050 | ) |  |  | 335,050 |  |  |  | 1,313 |  |  |  | 3.92 |
Restricted stock granted |  |  | (66,665 | ) |  |  |  |  |  |  |  |  |  |  |  |
Options exercised |  |  | — |  |  |  | (174,631 | ) |  |  | (445 | ) |  |  | 2.55 |
Options cancelled |  |  | 356,277 |  |  |  | (356,277 | ) |  |  | (1,550 | ) |  |  | 4.35 |
Options expired |  |  | (108,971) |  |  |  | — |  |  |  | — |  |  |  | — |
Balances as of December 29, 2012 |  |  | 741,978 |  |  |  | 1,570,543 |  |  |  | 5,698 |  |  |  | 3.63 |
Additional shares reserved |  |  | 52,128 |  |  |  | — |  |  |  | — |  |  |  | — |
Options granted |  |  | (149,600 | ) |  |  | 149,600 |  |  |  | 851 |  |  |  | 5.69 |
Restricted stock granted |  |  | (234,012 | ) |  |  | — |  |  |  | — |  |  |  | — |
Options exercised |  |  | — |  |  |  | (493,622 | ) |  |  | (1,495 | ) |  |  | 3.03 |
Options cancelled |  |  | 123,679 |  |  |  | (123,679 | ) |  |  | (698 | ) |  |  | 5.64 |
Options expired |  |  | (57,628) |  |  |  | — |  |  |  | — |  |  |  | — |
Balances as of December 28, 2013 |  |  | 476,545 |  |  |  | 1,102,842 |  |  |  | 4,356 |  |  |  | 3.97 |
Additional shares reserved |  |  | 503,306 |  |  |  | — |  |  |  | — |  |  |  | — |
Options granted |  |  | (158,300 | ) |  |  | 158,300 |  |  |  | 1,362 |  |  |  | 8.61 |
Restricted stock granted |  |  | (62,225 | ) |  |  | — |  |  |  | — |  |  |  | — |
Options exercised |  |  | — |  |  |  | (399,390 | ) |  |  | (1,501 | ) |  |  | 3.76 |
Options cancelled |  |  | 27,957 |  |  |  | (27,957 | ) |  |  | (171 | ) |  |  | 6.13 |
Awards cancelled |  |  | 79,890 |  |  |  | — |  |  |  | — |  |  |  | — |
Options expired |  |  | (13,056 | ) |  |  | — |  |  |  | — |  |  |  | — |
Balances as of January 3, 2015 |  |  | 854,117 |  |  |  | 833,795 |  |  | $ | 4,046 |  |  | $ | 4.88 |
Stock Options Outstanding and Exercisable | The following table summarizes information with respect to stock options outstanding and exercisable as of January 3, 2015:
|  | Options Outstanding |  |  | Options Vested and Exercisable |
Range of Exercise Prices |  | Number of Shares Outstanding as of January 3, 2015 |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Weighted Average Exercise Price |  |  | Number of Shares Exercisable as of January 3, 2015 |  |  | Weighted Average Exercise Price |
$0.90 - $3.07 |  |  | 96,025 |  |  |  | 1.12 |  |  | $ | 1.70 |  |  |  | 96,025 |  |  | $ | 1.70 |
$3.08 - $3.60 |  |  | 91,707 |  |  |  | 3.17 |  |  | $ | 3.51 |  |  |  | 72,064 |  |  | $ | 3.49 |
$3.72 - $3.75 |  |  | 33,250 |  |  |  | 3.83 |  |  | $ | 3.72 |  |  |  | 22,000 |  |  | $ | 3.73 |
$3.86 - $3.86 |  |  | 147,896 |  |  |  | 4.91 |  |  | $ | 3.86 |  |  |  | 59,646 |  |  | $ | 3.86 |
$3.89 - $4.31 |  |  | 140,325 |  |  |  | 3.12 |  |  | $ | 4.12 |  |  |  | 112,521 |  |  | $ | 4.15 |
$4.70 - $5.92 |  |  | 137,463 |  |  |  | 4.54 |  |  | $ | 5.50 |  |  |  | 64,546 |  |  | $ | 5.45 |
$6.00 - $8.58 |  |  | 122,129 |  |  |  | 5.92 |  |  | $ | 7.91 |  |  |  | 25,131 |  |  | $ | 7.45 |
$8.60 - $8.98 |  |  | 42,000 |  |  |  | 6.55 |  |  | $ | 8.84 |  |  |  | — |  |  | $ | — |
$9.34 - $9.34 |  |  | 20,000 |  |  |  | 6.18 |  |  | $ | 9.34 |  |  |  | — |  |  | $ | — |
$10.19 - $10.19 |  |  | 3,000 |  |  |  | 5.92 |  |  | $ | 10.19 |  |  |  | 813 |  |  | $ | 10.19 |
$0.90 - $10.19 |  |  | 833,795 |  |  |  | 4.14 |  |  | $ | 4.88 |  |  |  | 452,746 |  |  | $ | 3.85 |
Weighted Average Assumptions for Fair Value of Options Granted | The determination of the fair value of options granted by the Company is computed using the Black-Scholes option pricing model with the following weighted average assumptions:
|  | Employee Stock Option Plan
|  | FY 2014 |  | FY 2013 |  | FY 2012
Average risk free interest rate |  | 1.49% |  | 1.12% |  | 0.68%
Expected life (in years) |  | 4.50 years |  | 4.50 years |  | 4.55 years
Dividend yield |  | — |  | — |  | —
Average volatility |  | 56.2% |  | 71.5% |  | 89.2%
Stock-Based Compensation Expense | The following table shows stock-based compensation expense by functional line item in the consolidated statements of operations for 2014, 2013 and 2012 (in thousands):
|  | FY 2014 Year Ended |  |  | FY 2013 Year Ended |  |  | FY 2012 Year Ended |
|  | January 3, 2015 |  |  | December 28, 2013 |  |  | December 29, 2012 |
Cost of revenues |  | $ | 149 |  |  | $ | 108 |  |  | $ | 63 |
Research and development |  |  | 105 |  |  |  | 71 |  |  |  | 77 |
Sales and marketing |  |  | 118 |  |  |  | 113 |  |  |  | 105 |
General and administrative |  |  | 600 |  |  |  | 397 |  |  |  | 143 |
Total stock-based compensation expense – continuing operations |  |  | 972 |  |  |  | 689 |  |  |  | 388 |
Total stock-based compensation expense – discontinued operations |  |  | — |  |  |  | — |  |  |  | 8 |
Total stock-based compensation expense |  | $ | 972 |  |  | $ | 689 |  |  | $ | 396 |
Stock Options Outstanding, Exercisable and Expected to Vest | Information regarding stock options outstanding, exercisable and expected to vest as of January 3, 2015 is summarized below:
|  | Number of |  | Weighted Average |  |  | Weighted Average Remaining Contractual |  | Aggregate Intrinsic Value
|  | Shares |  | Exercise Price |  |  | Life (years) |  | (thousands)
Options outstanding |  |  | 833,795 |  | $ | 4.88 |  |  | 4.14 |  | $ | 3,139 |
Options vested and expected to vest |  |  | 781,361 |  | $ | 4.77 |  |  | 4.04 |  | $ | 3,026 |
Options exercisable |  |  | 452,746 |  | $ | 3.85 |  |  | 3.01 |  | $ | 2,158 |
Restricted Stock Units Outstanding, Vested and Expected to Vest | Information regarding the restricted stock units outstanding, vested and expected to vest as of January 3, 2015 is summarized below:
|  | Number of Shares |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (thousands) |
Restricted stock units outstanding |  |  | 277,390 |  |  |  | 0.59 |  |  | $ | 2,388 |
Restricted stock units vested and expected to vest |  |  | 196,858 |  |  |  | 0.23 |  |  | $ | 1,695 |
Restricted Stock Units and Awards | Information regarding the restricted stock units activity during the year ended January 3, 2015, December 28, 2013 and December 29, 2012 is summarized below:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding as of December 31, 2011 |  |  | 90,189 |  |  | $ | 3.49 |
Restricted stock units granted |  |  | 55,999 |  |  | $ | 3.85 |
Restricted stock units released |  |  | (15,189 | ) |  | $ | 3.95 |
Restricted stock units forfeited |  |  | (75,000 | ) |  | $ | 3.40 |
Outstanding as of December 29, 2012 |  |  | 55,999 |  |  | $ | 3.85 |
Restricted stock units granted |  |  | 230,509 |  |  | $ | 4.51 |
Restricted stock units released |  |  | (17,249 | ) |  | $ | 3.77 |
Outstanding as of December 28, 2013 |  |  | 269,259 |  |  | $ | 4.42 |
Restricted stock units granted |  |  | 59,780 |  |  | $ | 9.76 |
Restricted stock units released |  |  | (46,759 | ) |  | $ | 9.29 |
Restricted stock units forfeited |  |  | (4,890 | ) |  | $ | 8.18 |
Outstanding as of January 3, 2015 |  |  | 277,390 |  |  | $ | 4.68 |
Information regarding the restricted stock awards activity during the year ended January 3, 2015, December 28, 2013 and December 29, 2012 is summarized below:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding as of December 31, 2011 |  |  | 10,126 |  |  | $ | 3.95 |
Restricted stock awards granted |  |  | 10,666 |  |  |  | 3.75 |
Restricted stock awards released |  |  | (10,126 | ) |  | $ | 3.95 |
Outstanding as of December 29, 2012 |  |  | 10,666 |  |  | $ | 3.75 |
Restricted stock awards granted |  |  | 3,503 |  |  | $ | 5.71 |
Restricted stock awards released |  |  | (10,666 | ) |  | $ | 3.75 |
Outstanding as of December 28, 2013 |  |  | 3,503 |  |  | $ | 5.71 |
Restricted stock awards granted |  |  | 2,445 |  |  | $ | 8.18 |
Restricted stock awards released |  |  | (3,503 | ) |  | $ | 5.71 |
Outstanding as of January 3, 2015 |  |  | 2,445 |  |  | $ | 8.18 |

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