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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]    
Prepaid insurance $ 514 $ 100
Prepaid expenses 861 533
Prepaid income taxes   888
Other receivables 28 3
Total prepaid expenses and other current assets $ 1,403 $ 1,524