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Going Concern (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Oct. 09, 2018
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Working capital   $ 1,300    
Net loss   2,238 $ 3,006 $ 13,300
Net cash used in operating activities   $ (2,247) $ (3,468) $ (10,800)
Subsequent Events        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Proceeds from issuance of private placement of equity securities $ 3,000