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Goodwill (Tables)
12 Months Ended
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of goodwill activity
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