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Supporting Financial Information - Equipment and Improvements, net (Details) - USD ($)
$ in Thousands
6 Months Ended
Mar. 31, 2017
Sep. 30, 2016
Property, Plant and Equipment [Line Items]    
Document Fiscal Year Focus 2017  
Furniture and equipment $ 670 $ 638
Computer equipment 330 202
Computer software 800 309
Leasehold improvements 38 38
Property, Plant and Equipment, Gross 1,838 1,187
Less accumulated depreciation and amortization (718) (543)
Equipment and improvements, net $ 1,120 $ 644
Minimum | Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 3 years  
Maximum | Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 7 years