Description Of Business And Basis Of Presentation (Impact Of Restatement On Statement Of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2018
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Gain on disposal of DNI									$ (1,010)	$ 177	[1],[2]	$ 0	[1],[2]
Loss before income tax									(65,016)	(319,443)	[2]	94,558	[2]
Income tax expense									2,656	(5,072)	[2]	45,106	[2]
Net loss before earnings from equity-accounted investments									(67,672)	(314,371)	[2]	49,452	[2]
Earnings from equity-accounted investments									(29,542)	1,258	[2]	1,810	[2]
Net loss from continuing operations									(97,214)	(313,113)	[2]	51,262	[2]
Loss on disposal of discontinued operation, net of tax									12,454	(9,175)	[1],[2]	0	[1],[2]
Net loss									(78,358)	(308,658)	[1],[2]	61,207	[1],[2]
Net loss attributable to Net1	$ (38,880)	$ (34,881)	$ (205)	$ (4,392)	$ (183,048)	$ (58,819)	$ (63,941)	$ (5,199)	(78,358)	(311,007)	[2]	62,087	[2]
Continuing	(38,601)	(48,361)	(2,925)	(7,327)	(184,320)	(51,050)	(66,723)	(9,668)	(97,214)	(311,761)	[2]	52,142	[2]
Discontinued	$ (279)	$ 13,480	$ 2,720	$ 2,935	$ 1,272	$ (7,769)	$ 2,782	$ 4,469	$ 18,856	$ 754	[2]	$ 9,945	[2]
Basic (loss) earnings attributable to Net1 shareholders	$ (0.68)	$ (0.61)	$ 0	$ (0.08)	$ (3.22)	$ (1.03)	$ (1.12)	$ (0.09)	$ (1.37)	$ (5.48)	[2]	$ 1.1	[2]
Continuing	(0.68)	(0.85)	(0.05)	(0.13)	(3.24)	(0.9)	(1.17)	(0.17)	(1.7)	(5.49)	[2]	0.92	[2]
Discontinued	0	0.24	0.05	0.05	0.02	(0.13)	0.05	0.08	0.33	0.01	[2]	0.18	[2]
Diluted (loss) earnings attributable to Net1 shareholders	(0.69)	(0.62)	0	(0.08)	(3.27)	(1.04)	(1.13)	(0.09)	(1.37)	(5.48)	[2]	1.09	[2]
Continuing	(0.69)	(0.86)	(0.05)	(0.13)	(3.29)	(0.91)	(1.18)	(0.17)	(1.7)	(5.49)	[2]	0.92	[2]
Discontinued	$ 0	$ 0.24	$ 0.05	$ 0.05	$ 0.02	$ (0.13)	$ 0.05	$ 0.08	$ 0.33	$ 0.01	[2]	$ 0.17	[2]
Discontinued Operations [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Gain on disposal of DNI										$ 177
Loss before income tax										(319,443)
Income tax expense										(5,072)		$ 45,106
Net loss before earnings from equity-accounted investments										(314,371)		49,452
Earnings from equity-accounted investments										1,258		1,810
Net loss from continuing operations										(313,113)		51,262
Loss on disposal of discontinued operation, net of tax										(9,175)
Net loss										(308,658)		61,207
Net loss attributable to Net1										(311,007)		62,087
Continuing										(311,761)		52,142
Discontinued										$ 754		$ 9,945
Basic (loss) earnings attributable to Net1 shareholders										$ (5.48)		$ 1.1
Continuing										(5.49)		0.92
Discontinued										0.01		0.18
Diluted (loss) earnings attributable to Net1 shareholders										(5.48)		1.09
Continuing										(5.49)		0.92
Discontinued										$ 0.01		$ 0.17
Discontinued Operations [Member] | Scenario Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Gain on disposal of DNI										$ (631)
Loss before income tax										(320,251)
Income tax expense										(5,025)		$ 45,729
Net loss before earnings from equity-accounted investments										(315,226)		48,829
Earnings from equity-accounted investments										1,467		4,592
Net loss from continuing operations										(313,759)		53,421
Loss on disposal of discontinued operation, net of tax										(5,140)
Net loss										(305,269)		63,366
Net loss attributable to Net1										(307,618)		64,246
Continuing										(312,407)		54,301
Discontinued										$ 4,789		$ 9,945
Basic (loss) earnings attributable to Net1 shareholders										$ (5.42)		$ 1.13
Continuing										(5.5)		0.95
Discontinued										0.08		0.18
Diluted (loss) earnings attributable to Net1 shareholders										(5.42)		1.13
Continuing										(5.5)		0.96
Discontinued										$ 0.08		$ 0.17
Discontinued Operations [Member] | Restatement Adjustment [Member] | DNI [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Gain on disposal of DNI										$ 808
Loss before income tax										808
Income tax expense										0
Net loss before earnings from equity-accounted investments										808
Earnings from equity-accounted investments										0
Net loss from continuing operations										808
Loss on disposal of discontinued operation, net of tax										(4,035)
Net loss										(3,227)		$ 0
Net loss attributable to Net1										(3,227)
Continuing										808
Discontinued										$ (4,035)
Basic (loss) earnings attributable to Net1 shareholders										$ (0.06)
Continuing										0.01
Discontinued										(0.07)
Diluted (loss) earnings attributable to Net1 shareholders										(0.06)
Continuing										0.01
Discontinued										$ (0.07)
Discontinued Operations [Member] | Restatement Adjustment [Member] | Finbond [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Gain on disposal of DNI										$ 0
Loss before income tax										0
Income tax expense										(47)		(623)
Net loss before earnings from equity-accounted investments										47		623
Earnings from equity-accounted investments										(209)		(2,782)
Net loss from continuing operations										(162)		(2,159)
Loss on disposal of discontinued operation, net of tax										0
Net loss										(162)		(2,159)
Net loss attributable to Net1										(162)		(2,159)
Continuing										(162)		(2,159)
Discontinued										$ 0		$ 0
Basic (loss) earnings attributable to Net1 shareholders										$ 0		$ (0.04)
Continuing										0		(0.04)
Discontinued										0		0
Diluted (loss) earnings attributable to Net1 shareholders										0		(0.04)
Continuing										0		(0.04)
Discontinued										$ 0		$ 0

[1] Certain amounts have been restated to correct the misstatement discussed in Note 1

[2] Refer to Note 1