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Prepaid expenses and other current assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]    
Prepaid concession approval fees $ 79  
Prepaid for LCD procurement 51  
Rental deposits and other receivables 143 36
Total prepaid expenses and other current assets $ 273 $ 36