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Stockholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  |  |  |  | Weighted |  |  | Weighted |
|  |  |  |  | Average |  |  | Average |
|  | Options Outstanding |  |  | Exercise |  |  | Fair |
|  |  |  |  | Price |  |  | Value |
Beginning of the year |  | 1,674,065 |  | $ | 11.37 |  | $ | 10.74 |
Granted |  |  |  |  |  |  |  |  |
Exercised |  |  |  |  |  |  |  |  |
Forfeited |  | (167 | ) | $ | 6.30 |  | $ | 5.67 |
Expired |  | (34,056 | ) | $ | 9.42 |  | $ | 7.48 |
End of year |  | 1,639,842 |  | $ | 11.46 |  | $ | 10.85 |
Options exercisable |  | 1,523,536 |  | $ | 11.82 |  | $ | 11.22 |
|  |  |  |  | Weighted |  |  | Weighted |
|  |  |  |  | Average |  |  | Average |
|  | Options Outstanding |  |  | Exercise |  |  | Fair |
|  |  |  |  | Price |  |  | Value |
Beginning of the year |  | 1,772,348 |  | $ | 11.81 |  | $ | 11.04 |
Granted |  | 87,887 |  | $ | 5.51 |  |  | 4.88 |
Exercised |  |  |  |  |  |  |  |  |
Forfeited |  | (2,833 | ) | $ | 8.58 |  | $ | 7.73 |
Expired |  | (183,337 | ) | $ | 12.90 |  | $ | 10.96 |
End of year |  | 1,674,065 |  | $ | 11.37 |  | $ | 10.74 |
Options exercisable |  | 1,345,541 |  | $ | 12.62 |  | $ | 11.99 |
Schedule of Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
|  | Stock Options Outstanding |  |  | Stock Options Vested |
|  | Weighted |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |
|  | Average |  |  |  |  |  |  |  |  | Average |  |  |  |  |  |  |
|  | Remaining |  |  |  |  |  | Weighted |  |  | Remaining |  |  |  |  |  | Weighted |
|  | Contractual |  |  |  |  |  |  |  |  | Contractual |  |  |  |  |  |  |
|  |  |  |  | Number |  |  | Average |  |  |  |  |  | Number |  |  | Average |
|  | Life |  |  |  |  |  |  |  |  | Life |  |  |  |  |  |  |
|  |  |  |  | of |  |  |  |  |  |  |  |  | of |  |  |  |
|  | -Years |  |  | Awards |  |  | Exercise |  |  | -Years |  |  | Awards |  |  | Exercise |
|  |  |  |  |  |  |  | Price |  |  |  |  |  |  |  |  | Price |
Exercise Prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$4.50 - $8.70 |  | 6.27 |  |  | 844,801 |  | $ | 6.33 |  |  | 6.04 |  |  | 728,495 |  | $ | 6.27 |
$9.00 - $12.90 |  | 4.94 |  |  | 130,037 |  | $ | 10.46 |  |  | 4.94 |  |  | 130,037 |  | $ | 10.46 |
$13.50 -$18.90 |  | 3.3 |  |  | 358,336 |  | $ | 14.17 |  |  | 3.3 |  |  | 358,336 |  | $ | 14.17 |
$19.20 -$23.85 |  | 2.65 |  |  | 306,668 |  | $ | 22.84 |  |  | 2.65 |  |  | 306,668 |  | $ | 22.84 |
Total |  | 4.84 |  |  | 1,639,842 |  | $ | 11.46 |  |  | 4.62 |  |  | 1,523,536 |  | $ | 11.82 |
|  | Stock Options Outstanding |  |  | Stock Options Vested |
|  | Weighted |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |
|  | Average |  |  |  |  |  |  |  |  | Average |  |  |  |  |  |  |
|  | Remaining |  |  |  |  |  | Weighted |  |  | Remaining |  |  |  |  |  | Weighted |
|  | Contractual |  |  |  |  |  |  |  |  | Contractual |  |  |  |  |  |  |
|  |  |  |  | Number |  |  | Average |  |  |  |  |  | Number |  |  | Average |
|  | Life |  |  |  |  |  |  |  |  | Life |  |  |  |  |  |  |
|  |  |  |  | of |  |  |  |  |  |  |  |  | of |  |  |  |
|  | -Years |  |  | Awards |  |  | Exercise |  |  | -Years |  |  | Awards |  |  | Exercise |
|  |  |  |  |  |  |  | Price |  |  |  |  |  |  |  |  | Price |
Exercise Prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$4.50 - $8.70 |  | 7.07 |  |  | 871,195 |  | $ | 6.38 |  |  | 6.44 |  |  | 542,671 |  |  | 6.48 |
$9.00 - $12.90 |  | 5.08 |  |  | 152.340 |  | $ | 10.51 |  |  | 5.08 |  |  | 152,340 |  |  | 10.51 |
$13.50 -$18.90 |  | 4.26 |  |  | 343,862 |  | $ | 14.14 |  |  | 4.26 |  |  | 343,862 |  |  | 14.14 |
$19.20 -$23.85 |  | 3.65 |  |  | 306,668 |  | $ | 22.84 |  |  | 3.65 |  |  | 306,668 |  |  | 22.84 |
Total |  | 5.69 |  |  | 1,674,065 |  | $ | 11.37 |  |  | 5.09 |  |  | 1,345,541 |  |  | 12.62 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  |  |  |  | Weighted |
|  |  |  |  | Average |
|  |  |  |  | Grant |
|  |  |  |  | Date Fair |
|  | Number of |  |  | Value |
|  | Units |  |  |  |
Total awards outstanding at December 31, 2011 |  | 120,021 |  | $ | 6.14 |
Units granted |  |  |  | $ |  |
Units Exercised/Released |  | (76,989 | ) | $ | 5.95 |
Units Cancelled/Forfeited |  |  |  | $ |  |
Total awards outstanding at December 31, 2012 |  | 43,032 |  | $ | 6.49 |
Total units vested |  | - |  |  |  |
Total units non-vested |  | 43,032 |  | $ | 6.49 |
Total shares outstanding at December 31, 2012 |  | 43,032 |  | $ | 6.49 |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest [Table Text Block] |
|  | Year Ended |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2013 |  |  | 2014 |  |  | 2015 |  |  | 2016 |  |  | Thereafter |  |  | Total |
Scheduled vesting—restricted stock units |  | 28,739 |  |  | 14,293 |  |  | - - |  |  |  |  |  | - - |  |  | 43,032 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| Year Ended
| 12/31/2011
Average risk-free interest rate | 3.35%
Average expected life- years | 10
Expected volatility | 94.32%
Expected dividends | 0
Schedule of Share-based Compensation, Activity [Table Text Block] |
|  | Shares of |  |  | Amount |
|  | Common S tock |  |  |  |
Stock-based compensation |  | 2,264 |  | $ | 3,125 |

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: 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=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&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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- 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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