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Goodwill
 12 Months Ended
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
The carrying value and changes in the carrying value of goodwill attributable to each reportable segment were as follows:
Goodwill (in thousands)RSCGCAGGovDealsMachinioTotal
Balance at September 30, 2016$—  $21,403  $23,731  $—  $45,134  
Translation adjustments—  254  —  —  254  
Balance at September 30, 2017$—  $21,657  $23,731  $—  $45,388  
Business acquisition—  —  —  14,558  14,558  
Translation adjustments—  (127) —  —  (127) 
Balance at September 30, 2018$—  $21,530  $23,731  $14,558  $59,819  
Translation adjustments—  (352) —  —  (352) 
Balance at September 30, 2019$—  $21,178  $23,731  $14,558  $59,467  
Accumulated goodwill impairment losses as of September 30, 2019 and 2018 were $168.6 million.
Impairment Analysis
As of July 1, 2019, the Company performed a fair-value based test for all reporting units and determined each of its reporting units with goodwill balances substantially exceeded their carrying values, except for the Machinio reporting unit. The fair value of the Machinio reporting unit, which was acquired by the Company on July 10, 2018, exceeded its carrying value by approximately 11%. No impairment charge was recorded as a result of the annual test.
As of July 1, 2018, and July 1, 2017, the Company performed a fair-value based test for all reporting units and determined each of its reporting units with goodwill balances substantially exceeded their carrying values. No impairment charge was recorded as a result of these annual tests.
The fair values of the Company's reporting units were determined using discounted cash flow models, where cash flows were based upon Company estimates of future operating results for each reporting unit, and were discounted by a rate that reflected the risk inherent in each reporting unit's estimated cash flows.