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Property and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Sep. 30, 2017
Property and equipment, at cost $ 4,688 $ 4,690
Accumulated depreciation and amortization (3,838) (3,776)
Property and equipment, net 850 914
Computer software [Member]    
Property and equipment, at cost 1,447 1,447
Office equipment, furniture and fixtures and leasehold improvements [Member]    
Property and equipment, at cost $ 3,241 $ 3,243