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Stock-Based Compensation (Tables)
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12 Months Ended |
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Dec. 29, 2012
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Assumption of stock option's fair value |
The weighted-average fair value calculations are based on the following average assumptions: | | | | | | | | Fiscal Year
2012 | | Fiscal Year
2011 | | Fiscal Year
2010 | Stock Options: | | | | | | Expected life | 4.5 years | | 4.5 years | | 4.5 years | Volatility | 77.3% | | 77.0% | | 74.2% | Risk free interest rate | 0.80% | | 1.82% | | 2.04% | Dividends | — | | — | | — | Employee Stock Purchase Plan: | | | | | | Expected life | 0.5 years | | 0.5 years | | 0.5 years | Volatility | 45.5% | | 73.4% | | 80.3% | Risk free interest rate | 0.12% | | 0.19% | | 0.20% | Dividends | — | | — | | — |
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| Significant ranges of outstanding and exercisable options |
The following table summarizes significant ranges of outstanding and exercisable options as of December 29, 2012. | | | | | | | | | | | | | | | | | | Exercise Prices | Options Outstanding | | Options Exercisable | Number
Outstanding | | Weighted
Average
Remaining
Contractual Life
(Years) | | Weighted
Average
Exercise
Price | | Number
Exercisable | | Weighted
Average
Exercise
Price | $0.93-$2.71 | 212,592 |
| | 2.75 |
| | $ | 1.35 |
| | 212,592 |
| | $ | 1.35 |
| $5.25-$7.50 | 229,259 |
| | 3.48 |
| | $ | 7.13 |
| | 229,259 |
| | $ | 7.13 |
| $7.78-$10.21 | 152,130 |
| | 2.81 |
| | $ | 9.26 |
| | 121,151 |
| | $ | 9.18 |
| $10.46-$10.46 | 206,280 |
| | 4.30 |
| | $ | 10.46 |
| | 106,756 |
| | $ | 10.46 |
| $10.83-$11.37 | 212,518 |
| | 4.79 |
| | $ | 11.30 |
| | 123,872 |
| | $ | 11.25 |
| $11.63-$15.21 | 205,997 |
| | 5.04 |
| | $ | 13.74 |
| | 87,966 |
| | $ | 13.12 |
| $15.31-$16.16 | 213,464 |
| | 4.52 |
| | $ | 15.85 |
| | 141,573 |
| | $ | 15.92 |
| $16.41-$16.59 | 26,400 |
| | 5.46 |
| | $ | 16.52 |
| | 10,077 |
| | $ | 16.52 |
| $16.70-$16.70 | 351,079 |
| | 5.22 |
| | $ | 16.70 |
| | 145,755 |
| | $ | 16.70 |
| $17.23-$19.84 | 210,600 |
| | 6.01 |
| | $ | 18.35 |
| | 44,455 |
| | $ | 18.53 |
| $0.93-$19.84 | 2,020,319 |
| | 4.44 |
| | $ | 12.01 |
| | 1,223,456 |
| | $ | 10.11 |
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| Stock-based compensation expense for all share-based payment awards |
Stock-based compensation expense for all share-based payment awards made to the Company’s employees and directors pursuant to the employee stock option and employee stock purchase plans by function were as follows (in thousands): | | | | | | | | | | | | | | Fiscal Year
2012 | | Fiscal Year
2011 | | Fiscal Year
2010 | Cost of products | $ | 164 |
| | $ | 176 |
| | $ | 126 |
| Cost of service | 230 |
| | 218 |
| | 206 |
| Research and development | 1,220 |
| | 984 |
| | 514 |
| Selling | 1,791 |
| | 1,366 |
| | 596 |
| General and administrative | 2,485 |
| | 1,729 |
| | 1,508 |
| Total stock-based compensation expense related to employee stock options and employee stock purchases | $ | 5,890 |
| | $ | 4,473 |
| | $ | 2,950 |
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Stock Options and Restricted Stock Units [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock option plans activity |
A summary of activity under the Company’s stock option plans including options and RSUs during fiscal year 2012, and shares available for grant at December 29, 2012 is as follows: | | | | | Shares Available for Grant
(Options and RSUs) | Options and RSUs | | Shares available for grant at December 31, 2011 | 1,391,930 |
| Options granted | (281,085 | ) | Options cancelled | 139,376 |
| RSUs granted | (103,554 | ) | RSUs canceled | — |
| Plan shares expired | (53,102 | ) | Shares available for grant at December 29, 2012 | 1,093,565 |
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Stock Options [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock option plans activity |
A summary of activity of stock options in 2012 is as follows: | | | | | | | | | | | | | | | | Number of
Shares
Outstanding
(Options) | | Weighted
Average
Exercise
Price | | Weighted
Average
Remaining
Contractual Term (Years) | | Aggregate Intrinsic Value (in Thousands) | Options | | | | | | | | Outstanding at December 31, 2011 | 2,348,162 |
| | $ | 10.53 |
| | 4.86 |
| | — |
| Exercised | (469,552 | ) | | 6.52 |
| | — |
| | — |
| Granted | 281,085 |
| | 16.74 | | — |
| | — |
| Cancelled | (139,376 | ) | | 15.07 | | — |
| | — |
| Outstanding at December 29, 2012 | 2,020,319 |
| | $ | 12.01 |
| | 4.44 |
| | $ | 6,770 |
| Exercisable at December 29, 2012 | 1,223,456 |
| | $ | 10.11 |
| | 3.81 |
| | $ | 5,931 |
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Restricted Stock Units (RSUs) [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock option plans activity |
A summary of activity for RSUs is as follows: | | | | | | | RSU | Number
of RSU | Weighted
Average Fair
Value as of December 29, 2012 | Outstanding RSU as of December 31, 2011 | 300,058 |
| $ | 15.30 |
| Granted | 51,777 |
| 17.79 |
| Released | (116,673 | ) | 14.88 |
| Cancelled | — |
| — |
| Outstanding RSU as of December 29, 2012 | 235,162 |
| $ | 16.32 |
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