CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)	Additional Paid-In Capital	Retained Earnings	Total MiX Telematics Limited Stockholders’ Equity	Non-Controlling Interest
Beginning balance (in shares) at Mar. 31, 2020		600,934
Beginning balance at Mar. 31, 2020	$ 99,025	$ 66,522	$ (17,315)	$ (11,070)	$ (6,599)	$ 67,482	$ 99,020	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,874					5,874	5,874
Other comprehensive income (loss)	3,645			3,645			3,645
Issuance of common stock in relation to stock options and SARs exercised (in shares)		3,946
Issuance of common stock in relation to stock options and SARs exercised	825	$ 825					825
Stock-based compensation	594				594		594
Dividends	(2,510)					(2,510)	(2,510)
Ending balance (in shares) at Sep. 30, 2020		604,880
Ending balance at Sep. 30, 2020	107,453	$ 67,347	(17,315)	(7,425)	(6,005)	70,846	107,448	5
Beginning balance (in shares) at Jun. 30, 2020		601,019
Beginning balance at Jun. 30, 2020	102,607	$ 66,522	(17,315)	(8,986)	(6,306)	68,687	102,602	5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,452					3,452	3,452
Other comprehensive income (loss)	1,561			1,561			1,561
Issuance of common stock in relation to stock options and SARs exercised (in shares)		3,861
Issuance of common stock in relation to stock options and SARs exercised	825	$ 825					825
Stock-based compensation	301				301		301
Dividends	(1,293)					(1,293)	(1,293)
Ending balance (in shares) at Sep. 30, 2020		604,880
Ending balance at Sep. 30, 2020	$ 107,453	$ 67,347	(17,315)	(7,425)	(6,005)	70,846	107,448	5
Beginning balance (in shares) at Mar. 31, 2021	605,600	605,579
Beginning balance at Mar. 31, 2021	$ 123,399	$ 67,401	(17,315)	1,924	(5,326)	76,710	123,394	5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,830					4,830	4,830
Other comprehensive income (loss)	(1,581)			(1,581)			(1,581)
Issuance of common stock in relation to stock options and SARs exercised (in shares)		856
Issuance of common stock in relation to stock options and SARs exercised	0
Stock-based compensation	694				694		694
Dividends	$ (3,072)					(3,072)	(3,072)
Ending balance (in shares) at Sep. 30, 2021	606,400	606,435
Ending balance at Sep. 30, 2021	$ 124,270	$ 67,401	(17,315)	343	(4,632)	78,468	124,265	5
Beginning balance (in shares) at Jun. 30, 2021		606,080
Beginning balance at Jun. 30, 2021	128,895	$ 67,401	(17,315)	5,087	(4,962)	78,679	128,890	5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,299					1,299	1,299
Other comprehensive income (loss)	(4,744)			(4,744)			(4,744)
Issuance of common stock in relation to stock options and SARs exercised (in shares)		355
Issuance of common stock in relation to stock options and SARs exercised	0
Stock-based compensation	330				330		330
Dividends	$ (1,510)					(1,510)	(1,510)
Ending balance (in shares) at Sep. 30, 2021	606,400	606,435
Ending balance at Sep. 30, 2021	$ 124,270	$ 67,401	$ (17,315)	$ 343	$ (4,632)	$ 78,468	$ 124,265	$ 5