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Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Prepaid expenses and other current assets    
Prepaid LNG $ 105 $ 367
Prepaid insurance 876 174
Other Receivables 1,649 672
Deposits 579 578
Other 659 324
Prepaid expenses and other current expenses $ 3,868 $ 2,115