Prepaid and Other Current and Non-current Assets - Schedule of Components of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Prepaid Expense and Other Assets, Current [Abstract]
Subscriptions and deposits	$ 1,018	$ 968
Insurance	401	67
Prepaid rent	148	315
LNG vessel charges	651	0
Other	619	614
Total prepaid expenses and current assets	$ 2,837	$ 1,964