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Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Prepaid expenses and other current assets
Prepaid LNG	$ 90	$ 189
Prepaid insurance	734	698
Prepaid supplier expenses	299	229
Other receivables	1,521	1,655
Deposits	285	347
Other	182	465
Total prepaid expenses and other current assets	$ 3,111	$ 3,583

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