Equity-Accounted Investments And Other Long-Term Assets (Summary Of Unrealized Gain (Loss) On Investments) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Sep. 30, 2018	Jun. 30, 2018
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	$ 9,000	$ 9,000
Unrealized holding gains	1,551	1,395
Unrealized holding losses
Carrying value	10,551	10,395
Cedar Cellular [Member]
Schedule Of Equity And Held To Maturity Investments [Line Items]
Cost basis	9,000	9,000
Unrealized holding gains	1,551	1,395
Unrealized holding losses
Carrying value	$ 10,551	$ 10,395

Schedule Of Equity And Held To Maturity Investments [Line Items]

No definition available.

Name:	ueps_ScheduleOfEquityAndHeldToMaturityInvestmentsLineItems
Namespace Prefix:	ueps_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The sum of the realized and unrealized net gain (loss) on trading securities during the period.

No definition available.

Name:	us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Cost of investments in equity securities and other forms of securities that provide ownership interests classified as trading.

No definition available.

Name:	us-gaap_TradingSecuritiesEquityCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of unrealized holding gain before loss recognized in the income statement for investments in trading securities.

No definition available.

Name:	us-gaap_TradingSecuritiesUnrealizedHoldingGain
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of unrealized holding loss before gain recognized in the income statement for investments in trading securities.

No definition available.

Name:	us-gaap_TradingSecuritiesUnrealizedHoldingLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ueps_CedarCellularInvestment1LtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: