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Note 7 - Shareholders' Equity (Tables) | 6 Months Ended
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Jul. 01, 2012
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Six-Month Periods Ended |
|  | July 1, 2012 |  |  | July 3, 2011 |
Risk-free interest rate |  |  | 0.59 | % |  |  | 1.22 | %
Volatility factor |  |  | 62.88 | % |  |  | 60.63 | %
Dividends |  |  | 0.00 | % |  |  | 0.00 | %
Weighted average expected life (years) |  |  | 3.91 |  |  |  | 3.82 |
|  | Six-Month |
|  | Period Ended |
|  | July 3, 2011 |
Risk-free interest rate |  |  | 2.74 | %
Volatility factor |  |  | 63.79 | %
Dividends |  |  | 0.00 | %
Weighted average expected life (years) |  |  | 5.51 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Exercise Price Per Share |  |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value |
Shares under option at January 1, 2012 |  |  | 2,356,228 |  |  | $ | 8.34 |  |  |  |  |  |
Options granted |  |  | 156,000 |  |  |  | 4.02 |  |  |  |  |  |
Options exercised |  |  | (28,000 | ) |  |  | 4.09 |  |  |  |  |  |
Options forfeited |  |  | (52,816 | ) |  |  | 7.15 |  |  |  |  |  |
Options expired |  |  | (67,484 | ) |  |  | 13.78 |  |  |  |  |  |
Shares under option at July 1, 2012 |  |  | 2,363,928 |  |  | $ | 8.03 |  |  | 4.67 years |  | $ | - |
Vested and expected to vest as of July 1, 2012 |  |  | 2,087,864 |  |  | $ | 8.40 |  |  | 4.52 years |  | $ | - |
Options exercisable at July 1, 2012 |  |  | 996,070 |  |  | $ | 9.09 |  |  | 2.55 years |  | $ | - |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  |  |  |  | Weighted Average |
|  | Number of Shares |  |  | Grant Date Fair Value |
Unvested at December 31, 2011 |  |  | 1,218 |  |  | $ | 11.33 |
Granted |  |  | - |  |  |  | - |
Vested |  |  | (1,218 | ) |  |  | 11.33 |
Forfeited |  |  | - |  |  |  | - |
Unvested at July 1, 2012 |  |  | - |  |  | $ | - |

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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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