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Equity-Accounted Investments And Other Long-Term Assets (Narrative) (Details) R / shares in Units, SFr in Millions, R in Millions																1 Months Ended								3 Months Ended						9 Months Ended	12 Months Ended
	Feb. 03, 2021 USD ($)	Apr. 15, 2020 CHF (SFr)	Apr. 15, 2020 USD ($)	Apr. 13, 2020 CHF (SFr)	Apr. 13, 2020 USD ($)	Apr. 01, 2020 USD ($) Item shares	Apr. 01, 2020 ZAR (R) Item shares	Mar. 31, 2020 USD ($)	Mar. 09, 2020 ZAR (R) R / shares shares	Oct. 02, 2019 CHF (SFr)	Oct. 02, 2019 USD ($)	Aug. 02, 2019 shares	May 03, 2019 ZAR (R)	Aug. 02, 2017 USD ($) shares	Aug. 02, 2017 ZAR (R) shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($)	Nov. 30, 2020 USD ($)	Oct. 31, 2020 USD ($)	May 31, 2019 USD ($) shares	May 31, 2019 ZAR (R) shares	Jun. 30, 2017 USD ($)	Aug. 31, 2016 USD ($) Item	Jun. 30, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) Item	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 ZAR (R)	Mar. 31, 2021 USD ($)	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)		Jun. 30, 2019 USD ($)		Jun. 30, 2021 ZAR (R) R / shares shares	Apr. 22, 2021 USD ($)	Mar. 31, 2021 R / shares	Dec. 31, 2020 R / shares	Nov. 30, 2020 R / shares	Sep. 30, 2020 R / shares	Apr. 09, 2020	Feb. 29, 2020	Jan. 31, 2020 USD ($)	Aug. 31, 2019 USD ($)	May 03, 2019 USD ($)
Cash dividend received from equity method investment																															$ 0	$ 0		$ 284,000
Market value of holding																$ 10,004,000								$ 10,004,000							10,004,000	65,836,000
Aggregate purchase price of shares in cash																															0	2,500,000		2,989,000
Change in fair value of equity securities																															$ 49,304,000	0	[1]	$ (167,459,000)	[1]
Bank Frick [Member]
Fair value of consideration received	$ 15,000,000.0
Amount payable to terminate all existing arrangements and settle all liabilities	3,600,000
Transaction costs incurred	40,000.00
Consideration amount from disposal of discontinued operation including liabilities	18,600,000
Receivable On July 15, 2022 [Member] | Bank Frick [Member]
Fair value of consideration received	7,500,000
Receivable On October 30, 2021 [Member] | Bank Frick [Member]
Fair value of consideration received	3,900,000
DNI [Member]
Equity-accounted investments, ownership percentage																																		30.00%									27.00%
Minimum ownership percentage that should be owned in DNI unless whole remaining interest disposed off																															8.00%
Settlement of outstanding long-term borrowings																												$ 27,600,000	R 400.0
Impairment loss on equity method investment						$ 11,500,000		$ 1,600,000																								$ 13,100,000
Impairment loss included in accumulated other comprehensive loss								$ 11,300,000
Finbond [Member]
Equity-accounted investments, ownership percentage																31.00%								31.00%							31.00%	31.00%				31.00%
Investment shares owned | shares																268,820,933								268,820,933							268,820,933					268,820,933
Impairment loss on equity method investment																									$ 800,000	$ 16,800,000					$ 17,700,000
Market value of holding																$ 29,900,000								$ 29,900,000							$ 29,900,000					R 427,400.0
Number of additional shares acquired | shares												1,148,901
Shares repurchased | shares									47,000,000
Share price per share | R / shares									R 2.91123																											R 1.59			R 0.99		R 1.04
Business acquisition amount contributed | R									R 136.8
Number of shareholders that own approximately 90% of issued and outstanding shares | Item																										3
Liquidity discount																										15.00%
Percentage of issued and outstanding shares owned by three shareholders																										90.00%
V2 [Member]
Equity-accounted investments, ownership percentage																0.00%								0.00%							0.00%	50.00%				0.00%
Impairment loss on equity method investment																											$ 2,500,000			$ 500,000
Business acquisition amount contributed																																$ 5,000,000.0												$ 1,300,000	$ 1,300,000
Working capital facility																										$ 1,500,000						5,000,000.0
Fair value of consideration received																																					$ 1
Amount drawn from working capital facility grant																			$ 1,000,000.0													$ 500,000
Allowance for doubtful loans receivable																$ 1,500,000								$ 1,500,000							$ 1,500,000
Cell C [Member]
Equity-accounted investments, ownership percentage																15.00%								15.00%							15.00%					15.00%
CPS [Member]
Equity-accounted investments, ownership percentage																87.50%								87.50%							87.50%	87.50%				87.50%
Fixed interest rate on notes payable																																		24.82%
Notes payable amount																$ 0.0								$ 0.0							$ 0.0	$ 0.0
Interest income recognized																															$ 0	$ 0		$ 2,400,000
Present value of expected cash flows from debt security																																		0.0
Investment amortized cost basis before impairment																																		12,800,000
Other-than-temporary impairment related to the credit loss																																		12,800,000
Cedar Cellular [Member]
Equity-accounted investments, ownership percentage																7.625%								7.625%							7.625%	7.625%				7.625%
Fixed interest rate on notes payable																24.82%								24.82%							24.82%					24.82%
Notes payable amount																$ 0.0								$ 0.0							$ 0.0	$ 0.0
Interest income recognized																															0	2,400,000
Present value of expected cash flows from debt security																															$ 0.0
Investment amortized cost basis before impairment																																12,800,000
Other-than-temporary impairment related to the credit loss																																$ 12,800,000
Mobikwik [Member]
Equity-accounted investments, ownership percentage																11.00%								11.00%							11.00%	12.00%				11.00%
Investment amount owned																$ 76,300,000	$ 52,900,000	$ 27,000,000.0						$ 76,300,000	$ 42,100,000					$ 52,900,000	$ 76,300,000
Share price per share | R / shares																																				R 245.50		R 170.33		R 135.54
Aggregate purchase price of shares in cash																						$ 10,600,000	$ 15,000,000.0											$ 1,100,000
Change in fair value of equity securities																24,000,000.0	$ 10,800,000	$ 15,100,000													49,300,000
Mobikwik [Member] | Minimum [Member]
Number of users | Item																							100,000,000
Number of merchants | Item																							2,300,000
Equity investment acquisition period																							24 months
Mobikwik [Member] | Maximum [Member]
Market value of holding																							$ 40,000,000.0
Carbon [Member]
Investment amount owned																0								0							0
Impairment loss on equity method investment																								2,900,000
Market value of holding																$ 0								$ 0							$ 0
Bank Frick [Member]
Percentage of ownership interest								35.00%		35.00%	35.00%																35.00%
Equity acquisition amount under purchase agreement										SFr 46.4	$ 46,500,000
Average price to book valuation																											0.9
Return on equity, price to book ratio																											1.15
Cash dividend received from equity method investment				SFr 1.3	$ 1,300,000
Impairment loss on equity method investment																											$ 18,300,000
Bank Frick [Member] | Termination Agreement [Member]
Equity-accounted investments, ownership percentage																																										35.00%
Bank Frick [Member] | Termination Agreement [Member] | Net1 Holdings LI AG [Member]
Percentage of ownership interest																																										35.00%
Net1 SA [Member] | DNI [Member]
Equity-accounted investments, ownership percentage																																30.00%		38.00%
Cash consideration received on transaction																				$ 15,000,000.0	R 215.0
Settlement of outstanding long-term borrowings | R													R 230.0
Existing cash reserves to settle its outstanding long-term borrowings																																														$ 15,000,000.0
Net1 SA [Member] | DNI [Member] | Class A [Member]
Number of shares sold | shares																				7,605,235	7,605,235
Net1 SA [Member] | DNI [Member] | Sale Of Remaining Interest in DNI [Member] | Call Option [Member]
Number of shares sold | shares						3,508,455	3,508,455													30,394,765	30,394,765
Cash consideration received on transaction						$ 5,500,000	R 99.2
Option strike price used to calculate the strike price for 27% retained interest																				$ 158,000,000.0	R 2,827.0
Option strike price on 27% of retained interest																				$ 48,000,000.0	R 859.3
Minimum smaller denominations a call options can be split, percent																				20.00%	20.00%
Net1 SA [Member] | DNI [Member] | Minimum [Member] | Sale Of Remaining Interest in DNI [Member] | Call Option [Member]
Percentage of voting and participation interests required to be acquired by nominated party to exercise a call option																				2.50%	2.50%
Net1 SA [Member] | Finbond [Member]
Equity-accounted investments, ownership percentage																31.47%								31.47%							31.47%					31.47%
Net1 SA [Member] | Cell C [Member] | Class A [Member]
Investment shares owned | shares														75,000,000	75,000,000
Aggregate purchase price of shares in cash														$ 151,000,000.0	R 2,000.0
Net1 SA [Member] | MIC [Member] | Unsecured Notes Payable [Member]
Estimated debt transaction costs						$ 1,000,000.0
Net1 SA [Member] | MIC [Member] | Sale Of Remaining Interest in DNI [Member] | Call Option [Member]
Number of shares sold | shares						26,886,310	26,886,310
Cash consideration received on transaction						$ 42,500,000	R 760.0
Net1 SA [Member] | MIC [Member] | Sale Of Remaining Interest in DNI [Member] | Unsecured Notes Payable [Member]
Present value of the note and expected cash repayments						$ 5,400,000	R 95.7
Rate used by Rand Merchant Bank to derive a 24 month interest rate						0.30%	0.30%
Notes receivable obtained in exchange for shares sold to DNI | R							R 99.2
Number of equal installment payments | Item						18	18
Fixed interest rate on notes payable						7.25%
Periodic principal payment amount						$ 300,000	R 5.5
Interest rate used to determine the present value						6.63%	6.63%
Net1 SA [Member] | MIC [Member] | Sale Of Remaining Interest in DNI [Member] | Unsecured Notes Payable [Member] | JIBAR [Member]
Debt instrument variable interest rate						6.33%	6.33%
Net1 SA [Member] | Bank Frick [Member] | Minimum [Member]
Return on equity, price to book ratio																																0.7
Net1 SA [Member] | Bank Frick [Member] | Maximum [Member]
Return on equity, price to book ratio																																4.7
Frick Family Foundation [Member] | Bank Frick [Member]
Termination fee paid to the Frick Family to cancel option		SFr 17.0	$ 17,500,000
Fair value of consideration received	$ 30,000,000
Percentage of retained equity ownership interest disposed	35.00%
[1] <div>Certain amounts have been restated to correct the misstatement discussed in Note 1.</div>

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