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Quarterly Results of Operations (unaudited) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Quarterly Results of Operations (unaudited) |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 44,624,000 | $ 44,640,000 | $ 59,114,000 | $ 55,007,000 | $ 60,411,000 | $ 72,455,000 | $ 93,380,000 | $ 93,170,000 | $ 203,385,000 | $ 319,416,000 | $ 275,212,000
Gross profit | 480,000 | 14,367,000 | 22,788,000 | 20,536,000 | 22,623,000 | 26,895,000 | 34,138,000 | 31,081,000 | 58,171,000 | 114,737,000 | 85,838,000
Net income (loss) | (14,818,000) | (8,718,000) | (471,000) | (10,027,000) | (2,113,000) | 1,151,000 | 4,227,000 | 1,812,000 | (34,034,000) | 5,077,000 | (17,573,000)
Net income (loss) per share basic and diluted (in dollars per share) | $ (0.14) | $ (0.08) |  | $ (0.09) | $ (0.02) | $ 0.01 | $ 0.04 | $ 0.02 |  | $ 0.05 | $ (0.17)
Tax expense related to an uncertain tax position in a certain foreign jurisdiction |  |  | 800,000 |  | 900,000 |  |  |  |  |  |
Quarterly charges and expenses |  |  |  |  |  |  |  |  |  |  |
Gain on sale of dry strip assets and intellectual property |  |  |  |  |  |  |  |  | 7,904,000 |  |
Restructuring charges | 600,000 | 600,000 | 100,000 | 2,900,000 |  |  |  |  | 4,169,000 |  |
One-time expense |  |  |  |  |  |  |  |  |  |  |
Quarterly charges and expenses |  |  |  |  |  |  |  |  |  |  |
One-time marketing expense | 2,100,000 |  |  |  |  |  |  |  |  |  |
Dry strip product line, intellectual property rights and certain assets |  |  |  |  |  |  |  |  |  |  |
Quarterly charges and expenses |  |  |  |  |  |  |  |  |  |  |
Gain on sale of dry strip assets and intellectual property |  |  |  |  |  |  |  |  | 7,900,000 |  |
Inventory reserves |  |  |  |  |  |  |  |  |  |  |
Quarterly charges and expenses |  |  |  |  |  |  |  |  |  |  |
Provision for excess inventory | 13,400,000 |  |  |  |  |  |  |  | 14,492,000 | 1,015,000 | 2,015,000
Gain on sale of dry strip assets and intellectual property | $ 7,904,000 |  |  |  |  |  |  |  | $ 7,904,000 |  |

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