Stock-Based Compensation (Narrative) (Details) - USD ($)						1 Months Ended								12 Months Ended
	Sep. 30, 2020	Aug. 05, 2020	Mar. 01, 2020	Mar. 01, 2019	Aug. 27, 2014	Feb. 29, 2020	May 31, 2018	Mar. 31, 2018	Aug. 31, 2017	May 31, 2017	May 31, 2016	Nov. 30, 2014	Aug. 31, 2014	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded														561,000	600,000
Stock options granted exercise price														$ 5.83	$ 7.81	$ 13.99	$ 13.87
Forfeitures, Number of shares														93,928	174,695	37,333
Options exercise price range, lower limit														$ 3.07
Options exercise price range, upper limit														$ 11.23
Stock-based compensation charge, net														$ 1,728,000	$ 393,000	$ 2,607,000
Deferred tax asset related to stock-based compensation														400,000	200,000
Share-based compensation deferred tax asset valuation allowance														400,000	200,000
Valuation allowance														$ 106,433,000	$ 125,887,000
Expired unexercised, number of shares															370,000
Exercisable, Number of Shares														474,986
August 2015 Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded																	301,537
August 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, linear interpolation															$ 2.8
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of common stock issuable under plan														11,052,580
Maximum number of shares for which awards may granted during calendar year to any participant														569,120
Maximum number of shares subject to stock option awards that can be granted during calendar year														569,120
Maximum amount that can be granted in calendar year awards other than stock options														$ 20,000,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, expiration period														10 years
Share based compensation, vesting period														3 years
Exercisable stock options														170,335		105,982
Options exercise price range, lower limit														$ 3.07
Options exercise price range, upper limit														$ 11.23
Expected volatility														57.00%	44.00%
Expected life (in years)														3 years	3 years
Risk-free rate														1.57%	2.75%
Unrecognized compensation cost																		$ 9,000,000
Unrecognized compensation cost, expected recognition period, years														2 years
Stock Options [Member] | May 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expired unexercised, number of shares															170,000
Stock Options [Member] | August 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expired unexercised, number of shares															200,000
Stock Options [Member] | Non-Employee Directors [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded		150,000
Stock options granted exercise price		$ 3.5
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded														568,000	148,000	618,411
Vested number of shares of restricted stock														18,908	64,003	56,250
Forfeitures, Number of shares														17,500	265,500	302,223
Unrecognized compensation cost														$ 2,300,000
Unrecognized compensation cost, expected recognition period, years														2 years
Fair value of restricted stock vested														$ 100,000	$ 500,000	$ 500,000
Restricted Stock [Member] | August 2015 Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Based Compensation Reversed Shares																	301,537
Restricted Stock [Member] | September 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, vesting period														3 years
Expected volatility calculation term														30 years
Expected volatility														37.40%
Restricted Stock [Member] | August 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility														44.00%
Expected life (in years)														3 years
Future dividends														$ 0
Period of trading days to the trigger events														30 days
Restricted Stock [Member] | February 2020 [Member] | 50% Vest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage														8.00%
Restricted Stock [Member] | February 2020 [Member] | 100% Vest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage														14.00%
Restricted Stock [Member] | Executive Officers [Member] | Time-Based Vesting [Member] | Performance Conditions Were Not Achieved [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited															150,000
Restricted Stock [Member] | Executive Officers [Member] | Time-Based Vesting [Member] | 50% Of Original Award Forfeited Upon Disposal Of Net1 Korea [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited														7,500
Share-based compensation arrangement acceletrated vesting number														7,500
Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded														148,000
Percentage of increase target price														55.00%
Closing price, per share														$ 6.2
Share based compensation number of stock award forfeited														58,000
Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | Below $15 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														$ 15
Vesting percentage														0.00%
Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $15 and below $19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage														33.00%
Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $19 and below $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage														66.00%
Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														$ 23
Vesting percentage														100.00%
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded														210,000
Strike price														$ 0
Percentage of increase target price														35.00%
Closing price, per share														$ 9.38
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | Below $15 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														$ 15
Vesting percentage														0.00%
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $15 and below $19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage														33.00%
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $19 and below $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage														66.00%
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														$ 23
Vesting percentage														100.00%
Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | Market And Time-based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock awarded									210,000
Restricted Stock [Member] | Executive Officers [Member] | August 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded														350,000
Number of shares forfeited															150,000
Stock Based Compensation Reversed Shares															150,000
Restricted Stock [Member] | Executive Officers [Member] | August 2016 [Member] | One-Third Shares Vest 2019 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, to be achieved															$ 2.6
Restricted Stock [Member] | Executive Officers [Member] | August 2016 [Member] | Two-Thirds Shares Vest 2019 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, to be achieved															2.8
Restricted Stock [Member] | Executive Officers [Member] | August 2016 [Member] | All Shares Vest 2019 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, to be achieved															$ 3
Restricted Stock [Member] | Executive Officers [Member] | August 2016 [Member] | Scenario Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares forfeited	150,000
Restricted Stock [Member] | Executive Officers [Member] | February 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded														454,400
Share based compensation number of stock award forfeited														267,200
Restricted Stock [Member] | Executive Officers [Member] | February 2020 [Member] | Time-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock awarded						113,600
Restricted Stock [Member] | Executive Officers [Member] | February 2020 [Member] | Performance And Time-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock awarded						454,400
Restricted Stock [Member] | Executive Officers [Member] | February 2020 [Member] | Market And Time-based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock awarded						148,000
Restricted Stock [Member] | Executive Officers [Member] | February 2020 [Member] | Vest Upon Mr. Kotze Separation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement acceletrated vesting number						66,800
Restricted Stock [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, vesting period																1 year	3 years
Vested number of shares of restricted stock																56,250
Restricted Stock [Member] | Non-Employee Directors [Member] | August 2017 [Member] | 100% Vest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested number of shares of restricted stock																56,250
Restricted Stock [Member] | Non-Employee Directors [Member] | August 2017 [Member] | Vest If Recipient Was Director On August 23, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested number of shares of restricted stock															52,594
Share based compensation number of stock awarded									52,594
Restricted Stock [Member] | Executive Officers And Employees [Member] | Market Conditions Were Not Achieved [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited																95,326
Restricted Stock [Member] | Executive Officers And Employees [Member] | Performance Conditions Were Not Achieved [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited																173,262
Restricted Stock [Member] | Executive Officers And Employees [Member] | August 2017 [Member] | Time-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock awarded									326,000
Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options awarded												71,530	127,626
Strike price														$ 0
Expected volatility calculation term														30 days
Percentage of increase target price					20.00%
Expected volatility												63.73%	76.01%
Expected life (in years)												3 years	3 years
Risk-free rate												1.21%	1.27%
Future dividends												$ 0	$ 0
Restricted Stock [Member] | Employees [Member] | Termination Which Either Performance Or Market Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited																30,635
Restricted Stock [Member] | Employees [Member] | Termination [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited														17,500		3,000
Restricted Stock [Member] | Employees [Member] | August 2015 Awards [Member] | One-Third Shares Vest 2018 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, to be achieved																$ 2.88
Restricted Stock [Member] | Employees [Member] | August 2015 Awards [Member] | Two-Thirds Shares Vest 2018 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, to be achieved																3.3
Restricted Stock [Member] | Employees [Member] | August 2015 Awards [Member] | All Shares Vest 2018 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, to be achieved																$ 3.76
Restricted Stock [Member] | Employees [Member] | Time-Based Vesting [Member] | Termination [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited															115,500
Restricted Stock [Member] | Employees [Member] | May 2018 [Member] | Vest If Recipient Employed On Full Time Basis On August 23, 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock awarded							7,000
Restricted Stock [Member] | Chief Financial Officer [Member] | March 2018 [Member] | Subject To Continued Employment Tranche One[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested number of shares of restricted stock				11,409
Restricted Stock [Member] | Chief Financial Officer [Member] | March 2018 [Member] | Subject To Continued Employment Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested number of shares of restricted stock			11,408
Restricted Stock [Member] | Chief Financial Officer [Member] | March 2018 [Member] | Subject To Continued Employment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested number of shares of restricted stock			22,817
Share based compensation number of stock awarded								22,817
Restricted Stock [Member] | Employees And Former Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation number of stock award forfeited																	205,470
Restricted Stock [Member] | Former Chief Executive Officer [Member] | August 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement acceletrated vesting number										200,000
Fundamental EPS 2018 [Member] | August 2015 Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS, linear interpolation														$ 3.3
Fundamental EPS 2018 [Member] | August 2015 Awards [Member] | Not Achieving 2018 Fundamental EPS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock shares that will impact fundamental EPS calculation											10,000,000
Minimum [Member] | August 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS															$ 2.6
Minimum [Member] | Restricted Stock [Member] | August 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate														1.275%
Minimum [Member] | Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $15 and below $19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														$ 15
Minimum [Member] | Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $19 and below $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														19
Minimum [Member] | Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $15 and below $19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														19
Minimum [Member] | Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $19 and below $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														15
Minimum [Member] | Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price, per share					$ 11.23
Minimum [Member] | Fundamental EPS 2018 [Member] | August 2015 Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS														$ 2.88
Maximum [Member] | August 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS															$ 3
Maximum [Member] | Restricted Stock [Member] | August 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate														1.657%
Maximum [Member] | Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $15 and below $19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														$ 19
Maximum [Member] | Restricted Stock [Member] | Executive Officers [Member] | September 2018 [Member] | At or above $19 and below $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														23
Maximum [Member] | Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $15 and below $19 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														23
Maximum [Member] | Restricted Stock [Member] | Executive Officers [Member] | August 2017 [Member] | At or above $19 and below $23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, per share														19
Maximum [Member] | Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price, per share					$ 19.41
Maximum [Member] | Fundamental EPS 2018 [Member] | August 2015 Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fundamental EPS														$ 3.76