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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Prepaid Expense And Other Assets Current [Abstract]    
Insurance premiums $ 168 $ 421
Security deposit 50 50
VAT/GST receivable 37 29
Software 26 15
Financing costs 25 70
Other 76 115
Total prepaid expenses and other current assets $ 382 $ 700