XML 89 R77.htm IDEA: XBRL DOCUMENT v3.20.2
REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($)
Jun. 30, 2020
Sep. 30, 2019
Refund transfer product fees    
Disaggregation of Revenue [Line Items]    
Accounts receivable, before allowance for credit loss, current $ 0 $ 0