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Summary of Significant Accounting Policies - Deferred Revenue (Details) | 12 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Timing of revenue recognition | Deferred revenue is primarily derived from subscription fees charged to customers for promotional placement on Machinio's search engine over periods ranging from one to fifteen months.

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- Definition Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045 + Details
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