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STOCK BASED COMPENSATION. (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of option activity | Summaries of the status of Company’s stock option plans as of December 31, 2017 and 2016 and of changes in options outstanding under the Company’s plans during those years are as follows (number of shares in thousands):
|  | Years Ended December 31, |
|  | 2017 |  |  | 2016 |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding at beginning of year |  |  | 240 |  |  | $ | 4.18 |  |  |  | 240 |  |  | $ | 4.18 |
Exercised |  |  | (10 | ) |  |  | 3.74 |  |  |  | — |  |  |  | — |
Outstanding at end of year |  |  | 230 |  |  | $ | 4.18 |  |  |  | 240 |  |  | $ | 4.18 |
Options exercisable at end of year |  |  | 230 |  |  | $ | 4.18 |  |  |  | 240 |  |  | $ | 4.18 |
Schedule of stock options by exercise price range | Stock options outstanding as of December 31, 2017 were as follows (number of shares in thousands):
|  |  |  |  | Options Outstanding |  |  |  | Options Exercisable |
| Range of Exercise Prices |  |  |  | Number Outstanding |  |  |  | Weighted Average Remaining Contractual Life (yrs.) |  |  |  | Weighted Average Exercise Price |  |  |  | Number Exercisable |  |  |  | Weighted Average Exercise Price |
$ | 3.74 |  |  |  | 219 |  |  |  | 5.47 |  |  | $ | 3.74 |  |  |  | 219 |  |  | $ | 3.74 |
$ | 12.90 |  |  |  | 11 |  |  |  | 3.59 |  |  | $ | 12.90 |  |  |  | 11 |  |  | $ | 12.90 |
Schedule of unvested restricted stock activity | The Company granted to certain employees and directors shares of restricted stock under its 2006 and 2016 Stock Incentive Plans. A summary of unvested restricted stock activity is as follows (shares in thousands):
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Unvested at December 31, 2014 |  |  | 390 |  |  | $ | 8.71 |
Issued |  |  | 307 |  |  | $ | 10.16 |
Vested |  |  | (220 | ) |  | $ | 7.94 |
Canceled |  |  | (14 | ) |  | $ | 10.08 |
Unvested at December 31, 2015 |  |  | 463 |  |  | $ | 10.00 |
Issued |  |  | 742 |  |  | $ | 5.24 |
Vested |  |  | (250 | ) |  | $ | 9.01 |
Canceled |  |  | (25 | ) |  | $ | 6.24 |
Unvested at December 31, 2016 |  |  | 930 |  |  | $ | 6.57 |
Issued |  |  | 664 |  |  | $ | 6.65 |
Vested |  |  | (480 | ) |  | $ | 7.30 |
Canceled |  |  | (37 | ) |  | $ | 6.08 |
Unvested at December 31, 2017 |  |  | 1,077 |  |  | $ | 6.31 |
Schedule of stock-based compensation expense | Stock-based compensation expense related to employee and non-employee restricted stock and option grants recognized in selling, general and administrative expenses, were as follows (in thousands):\
|  | Years Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Employees |  | $ | 3,303 |  |  | $ | 2,173 |  |  | $ | 1,694 |
Non-employees |  |  | 525 |  |  |  | 443 |  |  |  | 325 |
Total stock-based compensation expense |  | $ | 3,828 |  |  | $ | 2,616 |  |  | $ | 2,019 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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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