Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Prepaid Expenses And Other Current Assets
Prepaid services	$ 86	$ 153
Deferred offering costs (Ses note 9)	160
Total prepaid expenses and other current assets	$ 246	$ 153