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SHAREHOLDERS' EQUITY (Tables) | 6 Months Ended
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Jun. 30, 2013
Equity [Abstract] |
Shareholders equity |
| Series A Nonconvertible |  |  | Additional |  | Accumulated Other |  |  | Total
| Preferred Stock | Common Stock | Paid-In | Accumulated | Comprehensive | Treasury Stock | Shareholders’
| Shares | Amount | Shares | Amount | Capital | Deficit | Loss | Shares | Amount | Equity
Balance, January 1, 2013 | 200,000 |  | $ | 2 |  | 46,561,437 |  | $ | 465 |  | $ | 564,883 |  | $ | (204,211 | ) | $ | (5,702 | ) | (205,902 | ) | $ | (5,202 | ) | $ | 350,235 |
Net income | — |  | — |  | — |  | — |  | — |  | 10,624 |  | — |  | — |  | — |  | 10,624 |
Other comprehensive income | — |  | — |  | — |  | — |  | — |  | — |  | 375 |  | — |  | — |  | 375 |
Repurchase of common stock | — |  | — |  | — |  | — |  | — |  | — |  | — |  | (195,599 | ) | (5,456 | ) | (5,456 | )
Exercise of common stock options, net of tendered shares | — |  | — |  | 24,020 |  | — |  | 271 |  | — |  | — |  | — |  | — |  | 271 |
Stock-based employee compensation, net of shares withheld for employee taxes (A) | — |  | — |  | (13,882 | ) | — |  | 328 |  | — |  | — |  | — |  | — |  | 328 |
Issuance of common stock to Board of Directors and Scientific Advisory Board (B) | — |  | — |  | 29,153 |  | 1 |  | 693 |  | — |  | — |  | — |  | — |  | 694 |
Issuance of common stock under an Employee Stock Purchase Plan | — |  | — |  | 7,775 |  | — |  | 234 |  | — |  | — |  | — |  | — |  | 234 |
Balance, June 30, 2013 | 200,000 |  | $ | 2 |  | 46,608,503 |  | $ | 466 |  | $ | 566,409 |  | $ | (193,587 | ) | $ | (5,327 | ) | (401,501 | ) | $ | (10,658 | ) | $ | 357,305 |
(A) | Includes $435 (13,356 shares) that was accrued for in a previous period and charged to expense when earned, but issued in 2013, less shares withheld for taxes in the amount of $153 (4,672 shares).
(B) | Includes $300 (9,212 shares) that was earned in a previous period and charged to expense when earned, but issued in 2013.

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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