Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Oct. 31, 2017
Prepaid Expenses And Other Current Assets
Legal retainer		$ 15
Prepaid insurance	64	69
Other prepaids	88	126
Advances on equipment purchase	435
Other assets	39	27
Total prepaid expenses and other current assets	$ 626	$ 237