XML 75 R46.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Summary of Significant Accounting Policies - Deferred Revenue (Details)
12 Months Ended
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.