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Note 13 - Share-based Compensation (Tables) | 12 Months Ended
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Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Common Shares |  |  |  |  |
|  | Options Outstanding |  |  | Exercisable |  |  | Available for Grant |  |  | Weighted-Average E xercise Price |
201 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 29, 2013 |  |  | 798,171 |  |  |  | 585,769 |  |  |  | 263,424 |  |  | $ | 5.97 |
Exercised |  |  | (28,343 | ) |  |  |  |  |  |  | — |  |  |  | 4.73 |
Forfeited/cancelled/expired |  |  | (25,211 | ) |  |  |  |  |  |  | 24,211 |  |  |  | 5.19 |
Granted |  |  | 11,000 |  |  |  |  |  |  |  | (11,000 | ) |  |  | 9.18 |
Balance at December 28, 2014 |  |  | 755,617 |  |  |  | 616,792 |  |  |  | 276,635 |  |  |  | 6.09 |
201 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 30, 2012 |  |  | 764,034 |  |  |  | 649,412 |  |  |  | 437,797 |  |  | $ | 5.84 |
Exercised |  |  | (140,236 | ) |  |  |  |  |  |  | — |  |  |  | 5.52 |
Forfeited/cancelled/expired |  |  | (53,377 | ) |  |  |  |  |  |  | 53,377 |  |  |  | 6.25 |
Granted |  |  | 227,750 |  |  |  |  |  |  |  | (227,750 | ) |  |  | 6.18 |
Balance at December 29, 2013 |  |  | 798,171 |  |  |  | 585,769 |  |  |  | 263,424 |  |  |  | 5.97 |
201 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2012 |  |  | 822,334 |  |  |  | 577,690 |  |  |  | 437,297 |  |  | $ | 5.84 |
Forfeited/cancelled/expired |  |  | (58,300 | ) |  |  |  |  |  |  | 500 |  |  |  | 5.76 |
Balance at December 30, 2012 |  |  | 764,034 |  |  |  | 649,412 |  |  |  | 437,797 |  |  |  | 5.84 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2014 |  | 2013
Expected dividend yield |  |  | — |  |  |  | — |
Risk-free interest rate |  | 2.39 | – | 2.88% |  | 1.96 | – | 2.70%
Expected term (in years) |  |  | 10 |  |  |  | 10 |
Expected volatility |  | 32.87 | – | 39.35% |  | 39.32 | – | 43.78%
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
|  | Restricted Stock Units |  |  | Weighted-A verage G rant- Date Fair Value |
201 2 |  |  |  |  |  |  |  |
Balance at January 1, 2012 |  |  | 19,169 |  |  | $ | 6.50 |
Vested |  |  | (19,169 | ) |  |  | 6.50 |
Forfeited |  |  | — |  |  |  | — |
Balance at December 30, 2012 |  |  | — |  |  |  | — |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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 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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