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Note 11 - Stock Incentive Plans (Tables) | 12 Months Ended
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Dec. 30, 2017
Notes Tables |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted |  |  | Aggregate |
|  |  |  |  |  | Weighted |  |  | Average |  |  | Intrinsic |
|  | Number of |  |  | Average |  |  | Remaining |  |  | Value |
|  | Shares |  |  | Exercise Price |  |  | Contractual Term |  |  | (in thousands) |
Outstanding, January 3, 2015 |  |  | 714,451 |  |  | $ | 8.14 |  |  |  |  |  |  |  |  |
Granted |  |  | 71,517 |  |  |  | 20.58 |  |  |  |  |  |  |  |  |
Exercised |  |  | (150,409 | ) |  |  | 6.07 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (19,003 | ) |  |  | 12.15 |  |  |  |  |  |  |  |  |
Canceled or expired |  |  | (41,705 | ) |  |  | 32.95 |  |  |  |  |  |  |  |  |
Outstanding, January 2, 2016 |  |  | 574,851 |  |  |  | 8.30 |  |  |  |  |  |  |  |  |
Granted |  |  | 213,156 |  |  |  | 13.68 |  |  |  |  |  |  |  |  |
Exercised |  |  | (30,223 | ) |  |  | 5.91 |  |  |  |  |  |  |  |  |
Forfeited |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Canceled or expired |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2016 |  |  | 757,784 |  |  |  | 9.91 |  |  |  |  |  |  |  |  |
Granted |  |  | 72,051 |  |  |  | 8.85 |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,269 | ) |  |  | 6.36 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (26,795 | ) |  |  | 13.45 |  |  |  |  |  |  |  |  |
Canceled or expired |  |  | (10,204 | ) |  |  | 12.51 |  |  |  |  |  |  |  |  |
Outstanding, December 30, 2017 |  |  | 791,567 |  |  | $ | 9.67 |  |  |  | 5.8 |  |  | $ | 1,228 |
Options Exercisable As Of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 30, 2017 |  |  | 569,361 |  |  | $ | 8.46 |  |  |  | 4.8 |  |  | $ | 1,203 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Dividend yield |  |  | 0% |  |  |  |  | 0% |  |  |  |  |  | 0% |  |
Historical volatility |  |  | 47% |  |  |  | 52% | - | 55% |  |  |  | 51% | - | 58% |
Risk-free rate |  |  | 2% |  |  |  | 1.4% | - | 1.6% |  |  |  | 1.5% | - | 1.8% |
Expected life (in years) |  |  | 6 |  |  |  |  | 6 |  |  |  |  |  | 6 |  |
Weighted average grant date fair value |  |  | $4.18 |  |  |  |  | $7.13 |  |  |  |  |  | $11.20 |  |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Restricted Stock |  |  | Performance Shares |
|  |  |  |  |  | Weighted |  |  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |  |  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |  |  | Number of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |  |  | Shares |  |  | Fair Value |
Outstanding, January 3, 2015 |  |  | 419,674 |  |  | $ | 7.64 |  |  |  | - |  |  | $ | - |
Granted |  |  | 107,004 |  |  |  | 19.59 |  |  |  | 86,222 |  |  |  | 20.71 |
Vested |  |  | (205,137 | ) |  |  | 7.84 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (44,988 | ) |  |  | 8.89 |  |  |  | (2,160 | ) |  |  | 20.80 |
Canceled |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Outstanding, January 2, 2016 |  |  | 276,553 |  |  |  | 11.93 |  |  |  | 84,062 |  |  |  | 20.70 |
Granted |  |  | 203,613 |  |  |  | 13.58 |  |  |  | 176,611 |  |  |  | 13.68 |
Vested |  |  | (152,548 | ) |  |  | 11.22 |  |  |  | (7,039 | ) |  |  | 20.56 |
Forfeited |  |  | (11,502 | ) |  |  | 13.45 |  |  |  | - |  |  |  | - |
Canceled |  |  | - |  |  |  | — |  |  |  | (12,493 | ) |  |  | 20.56 |
Outstanding, December 31, 2016 |  |  | 316,116 |  |  |  | 13.30 |  |  |  | 241,141 |  |  |  | 15.39 |
Granted |  |  | 258,060 |  |  |  | 9.18 |  |  |  | 83,897 |  |  |  | 8.85 |
Vested |  |  | (179,132 | ) |  |  | 12.20 |  |  |  | (6,472 | ) |  |  | 20.54 |
Forfeited |  |  | (33,505 | ) |  |  | 12.55 |  |  |  | (15,247 | ) |  |  | 14.28 |
Canceled |  |  | - |  |  |  | — |  |  |  | (13,704 | ) |  |  | 13.68 |
Outstanding, December 30, 2017 |  |  | 361,539 |  |  | $ | 10.97 |  |  |  | 289,615 |  |  | $ | 13.66 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&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=96867065&loc=d3e5070-113901 + 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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