| **Earnings Per Share**                                        | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| **Earnings Per Share, Diluted, Other Disclosures [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Earnings Per Share                                            | Earnings Per ShareBasic net loss per share, or basic earnings/(loss) per share (“EPS”), is computed by dividing net loss to common shareholders by the weighted average number of common shares outstanding for the period.  We retired our preferred stock in 2011.Diluted EPS reflects the potential dilution that could occur if COB's potential common stock, which consists of dilutive stock options and a common stock warrant, were issued.  As required for entities with complex capital structures, a dual presentation of basic and diluted EPS is included on the face of the income statement, and a reconciliation of the numerator and denominator of the basic EPS computation to the numerator and denominator of the diluted EPS computation is provided in this note.(dollars in thousands, except per share data) For Three Months Ended For Nine Months Ended  September 30, 2013 September 30, 2012 September 30, 2013 September 30, 2012Income (Loss) from continuing operations, net of tax $4,006 $(4,712) $(3,773) $(33,682)Loss from discontinued operations, net of tax — — — (27)Net income (loss) to common shareholders $4,006 $(4,712) $(3,773) $(33,709)Weighted average number of common shares outstanding - basic and diluted 21,738,770 21,588,027 21,722,536 21,294,727Net income (loss) per common share from continuing operations - basic and diluted $0.18 $(0.22) $(0.17) $(1.58)Net loss per common share from discontinued operations - basic and diluted — — — —Net income (loss) per common share - basic and diluted $0.18 $(0.22) $(0.17) $(1.58)During the three months and nine months ended September 30, 2013 and 2012, the price of the Company's common stock (as quoted on the Nasdaq Capital Market) was below the exercise price of all vested stock options and the common stock warrant. As a result, the options and warrants were considered antidilutive and thus are not included in the diluted share calculation.  For the three months and nine months ended September 30, 2013, there were 23,197 antidilutive shares. For the three and nine months ended September 30, 2012, there were 23,347 antidilutive shares. Of the antidilutive shares, the number of shares relating to stock options were 1,125 for the three months and nine months ended September 30, 2013, and 1,275 for both the three months and nine months ended September 30, 2012, while the number relating to the warrant was 22,072 for all periods presented. |

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| - Definition
The entire disclosure for earnings per share.
+ References
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