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Stock-Based Compensation (Tables) | 3 Months Ended
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Apr. 03, 2015
Schedule of Employee Service Share-based Compensation [Line Items] |
Schedule Of Compensation Cost [Table Text Block] | The cost that has been charged against income for stock-based compensation is set forth below (in thousands):
|  | Three Months Ended |
|  | April 3, 2015 |  | April 4, 2014 |
Employee stock options |  | $ | 725 |  | $ | 859 |
Restricted stock |  |  | 271 |  |  | 299 |
Restricted stock units |  |  | 129 |  |  | 398 |
Nonemployee stock options |  |  | (7) |  |  | 22 |
Total |  | $ | 1,116 |  | $ | 1,578 |
Schedule of Share-based Compensation, Activity [Table Text Block] | The Company recorded stock-based compensation cost in the following categories on the accompanying condensed consolidated statements of operations (in thousands):
|  | Three Months Ended |
|  | April 3, 2015 |  | April 4, 2014 |
General and administrative |  | $ | 593 |  | $ | 928 |
Marketing and selling |  |  | 251 |  |  | 302 |
Research and development |  |  | 150 |  |  | 270 |
Total stock compensation expense |  | $ | 994 |  | $ | 1,500 |
Amounts capitalized as part of inventory |  |  | 122 |  |  | 78 |
Total |  | $ | 1,116 |  | $ | 1,578 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The risk-free rate is based on the U.S. Treasury yield curve corresponding to the expected term at the time of the grant.
|  | Three Months Ended |
|  | April 3, 2015 |  | April 4, 2014 |
Expected dividend yield |  |  | 0 | % |  | 0 | %
Expected volatility |  |  | 57.46 | % |  | 55.25 | %
Risk-free interest rate |  |  | 1.70 | % |  | 1.28 | %
Expected term (in years) |  |  | 5.64 |  |  | 4.12 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of option activity under the Plan for the period ended April 3, 2015 is presented below:
|  | Options Shares (000’s) |
Outstanding at January 2, 2015 |  |  | 3,175 |
Granted |  |  | 568 |
Exercised |  |  | (104) |
Forfeited or expired |  |  | (19) |
Outstanding at April 3, 2015 |  |  | 3,620 |
Exercisable at April 3, 2015 |  |  | 2,384 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | A summary of restricted stock and restricted stock units activity under the Plan for the period ended April 3, 2015 is presented below:
|  | Restricted Shares (000’s) |  | Restricted Units (000’s) |
Outstanding at January 2, 2015 |  |  | 247 |  |  | 156 |
Granted |  |  | - |  |  | 12 |
Vested |  |  | (90) |  |  | (10) |
Forfeited |  |  | - |  |  | (22) |
Outstanding at April 3, 2015 |  |  | 157 |  |  | 136 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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