Basis Of Presentation And Summary Of Significant Accounting Policies (Impact Of Restatement On Statement Of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019		Mar. 31, 2020	Mar. 31, 2019
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Loss on disposal of discontinued operation, net of tax	$ (12,733)	$ 9,175	[1]	$ (12,733)	$ 9,175	[1]
Net loss	34,881	59,547	[1]	39,478	125,620	[1]
Net (loss) income attributable to Net1	(34,881)	(58,819)	[1]	(39,478)	(127,959)	[1]
Continuing	(48,361)	(51,050)	[1]	(58,613)	(127,441)	[1]
Discontinued	$ 13,480	$ (7,769)	[1]	$ 19,135	$ (518)	[1]
Basic (loss) earnings attributable to Net1 shareholders	$ (0.61)	$ (1.03)	[1]	$ (0.69)	$ (2.25)	[1]
Continuing	(0.85)	(0.9)	[1]	(1.03)	(2.24)	[1]
Discontinued	0.24	(0.13)	[1]	0.34	(0.01)	[1]
Diluted (loss) earnings attributable to Net1 shareholders	(0.61)	(1.03)	[1]	(0.69)	(2.25)	[1]
Continuing	(0.85)	(0.9)	[1]	(1.03)	(2.24)	[1]
Discontinued	$ 0.24	$ (0.13)	[1]	$ 0.34	$ (0.01)	[1]
DNI Discontinued Operations Presentation [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Net loss		$ 59,547			$ 125,620
DNI Discontinued Operations Presentation [Member] | Scenario Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Loss on disposal of discontinued operation, net of tax		5,140			5,140
Net loss		55,512			121,585
Net (loss) income attributable to Net1		(54,784)			(123,924)
Continuing		(51,050)			(127,441)
Discontinued		$ (3,734)			$ 3,517
Basic (loss) earnings attributable to Net1 shareholders		$ (0.96)			$ (2.18)
Continuing		(0.9)			(2.24)
Discontinued		(0.06)			0.06
Diluted (loss) earnings attributable to Net1 shareholders		(0.96)			(2.18)
Continuing		(0.9)			(2.24)
Discontinued		$ (0.06)			$ 0.06
DNI Discontinued Operations Presentation [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Loss on disposal of discontinued operation, net of tax		$ 4,035			$ 4,035
Net loss		4,035			4,035
Net (loss) income attributable to Net1		(4,035)			(4,035)
Continuing		0			0
Discontinued		$ (4,035)			$ (4,035)
Basic (loss) earnings attributable to Net1 shareholders		$ (0.07)			$ (0.07)
Continuing		0			0
Discontinued		(0.07)			(0.07)
Diluted (loss) earnings attributable to Net1 shareholders		(0.07)			(0.07)
Continuing		0			0
Discontinued		$ (0.07)			$ (0.07)

[1] Refer to Note 1