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Goodwill (Tables) | 12 Months Ended
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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) |  | RSCG |  | CAG |  | GovDeals |  | Machinio |  | Total
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 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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