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Prepaid expenses and other current assets (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Prepaid Expenses and Other Current Assets | Prepaid expenses and other current assets consist of the following:
|  | As of December 31, |
|  | 2011 |  |  | 2012 |
Prepaid concession approval fees |  |  | — |  |  |  | 79 |
Prepaid for LCD procurement |  |  | — |  |  |  | 51 |
Rental deposits and other receivables |  |  | 36 |  |  |  | 143 |
Total prepaid expenses and other current assets |  | $ | 36 |  |  | $ | 273 |

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