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Consolidated Balance Sheets and Statements of Operations and Comprehensive Income (Loss) Components (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Accrued expenses and other liabilities: |  |  |
Accrued wages and employee benefits | $ 881 | $ 782 |
Employee stock purchase plan withholdings | 292 | 392 |
Professional fees | 503 | 271 |
Other | 2,271 | 1,334 |
Total | 3,947 | 2,779 |
Other income and expense, net: |  |  |
Interest income | 171 | 143 | 272
Other income and expense, net | (16) | 63 | (95)
Total | $ 155 | $ 206 | $ 177

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