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Stock Options, Stock Grants and New Stock (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of activity in the Company’s stock option plans | A summary of activity in the Company's stock option plans is as follows:
| Weighted Average Exercise Price |  | Options Outstanding |  | Weighted Average Contractual Term (in years) |  | Intrinsic Value of Options |  | Options Available
At December 29, 2012 | $ | 11.82 |  |  | 220,740 |  |  | 8.4 |  | $ | 367,937 |  |  | 138,260 |
Granted February 7, 2013 | $ | 13.70 |  |  | 40,594 |  |  |  |  |  |  | (40,594 | )
Exercised | $ | 10.69 |  |  | (15,247 | ) |  |  |  | $ | 64,263 |  |  |  |
Expired | $ | 12.70 |  |  | (83,351 | ) |  |  |  |  |  |  | 83,351 |
At December 28, 2013 | $ | 11.95 |  |  | 162,736 |  |  | 7.5 |  | $ | 582,894 |  |  | 181,017 |
Granted February 20, 2014 | $ | 14.76 |  |  | 13,790 |  |  |  |  |  |  |  | (13,790 | )
Exercised | $ | 11.23 |  |  | (17,074 | ) |  |  |  | $ | 91,772 |  |  |  |
Expired | $ | 13.70 |  |  | (2,157 | ) |  |  |  |  |  |  | 2,157 |
At January 3, 2015 | $ | 12.25 |  |  | 157,295 |  |  | 6.9 |  | $ | 852,810 |  |  | 169,384 |
Granted February 10, 2015 | $ | 16.01 |  |  | 32,532 |  |  |  |  |  |  | (32,532 | )
Exercised | $ | 12.47 |  |  | (666 | ) |  |  |  | $ | 1,511 |  |  |
Expired | $ | 14.08 |  |  | (15,176 | ) |  |  |  |  |  | 15,176 |
At December 31, 2015 | $ | 12.79 |  |  | 173,985 |  |  | 6.4 |  | $ | — |  |  | 152,028 |
Exercisable options | $ | 11.85 |  |  | 88,025 |  |  | 5.5 |  | $ | — |  |  |  |
Options expected to vest: |  |  |  |  |  |  |  |  | Grant Date Fair Value |  |  |
At December 28, 2013 | $ | 12.18 |  |  | 122,145 |  |  | 7.8 |  | $ | 7.19 |  |  |  |
Granted February 20, 2014 | $ | 14.76 |  |  | 13,790 |  |  |  |  | $ | 6.70 |  |  |  |
Vested | $ | 11.98 |  |  | (33,702 | ) |  |  |  | $ | 7.03 |  |  |  |
Forfeited unvested options | $ | 13.70 |  |  | (1,725 | ) |  |  |  |  |  |
At January 3, 2015 | $ | 12.54 |  |  | 100,508 |  |  | 7.2 |  | $ | 6.76 |  |  |  |
Granted February 10, 2015 | $ | 16.01 |  |  | 32,532 |  |  |  |  | $ | 6.39 |  |  |
Vested | $ | 12.16 |  |  | (35,794 | ) |  |  |  | $ | 7.01 |  |  |
Forfeited unvested options | $ | 14.23 |  |  | (11,286 | ) |  |  |  |  |  |
At December 31, 2015 | $ | 8.26 |  |  | 85,960 |  |  | 7.3 |  | $ | 6.57 |  |  |
Stock options by exercise price range | The following table summarizes information about stock options outstanding at December 31, 2015:
Range of Exercise Prices |  | Outstanding Stock Options |  | Exercisable Stock Options
| Shares |  | Weighted Average |  | Shares |  | Weighted Average Exercise Price
|  | Exercise Price |  | Remaining Contractual Life in Years |  |
$ | 11.55 |  |  | 82,342 |  |  | $ | 11.55 |  |  | 5.06 |  | 62,342 |  |  | $ | 11.55 |
$ | 11.35 |  |  | 25,076 |  |  | $ | 11.35 |  |  | 6.11 |  | 13,184 |  |  | $ | 11.35 |
$ | 13.70 |  |  | 27,801 |  |  | $ | 13.70 |  |  | 7.10 |  | 10,647 |  |  | $ | 13.70 |
$ | 14.76 |  |  | 9,260 |  |  | $ | 14.76 |  |  | 8.14 |  | 1,852 |  |  | $ | 14.76 |
$ | 16.01 |  |  | 29,506 |  |  | $ | 16.01 |  |  | 9.11 |  | — |  |  | $ | 16.01 |
|  |  | 173,985 |  |  |  |  |  |  |  | 88,025 |  |  |  |
Summary of Stock Awards Plan activity | A summary of plan activity for 2013, 2014 and 2015 is as follows:
| Shares |  | Weighted Average Grant Date Fair Value
Outstanding at December 29, 2012 | 32,473 |  |  | $ | 10.98 |
Vested | (8,161 | ) |  | $ | 11.06 |
Forfeited | (5,060 | ) |  | $ | 10.20 |
Outstanding at December 28, 2013 | 19,252 |  |  | $ | 11.15 |
Granted October 16, 2014 | 31,080 |  |  | $ | 15.69 |
Granted November 21, 2014 | 23,665 |  |  | $ | 15.85 |
Vested | (7,434 | ) |  | $ | 10.60 |
Forfeited | (160 | ) |  | $ | 13.34 |
Outstanding at January 3, 2015 | 66,403 |  |  | $ | 15.00 |
Granted January 5, 2015 | 3,000 |  |  | $ | 17.95 |
Vested | (18,303 | ) |  | $ | 13.67 |
Forfeited | (60 | ) |  | $ | 13.34 |
Outstanding at December 31, 2015 | 51,040 |  |  | $ | 15.65 |

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