CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income/(Loss)	Accumulated Other Comprehensive Income/(Loss) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income/(Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Total MiX Telematics Limited Stockholders’ Equity	Total MiX Telematics Limited Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjustment	Total MiX Telematics Limited Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjusted Balance	Non-Controlling Interest	Non-Controlling Interest Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Mar. 31, 2019				601,948	601,948
Beginning balance at Mar. 31, 2019	$ 116,941	$ (262)	$ 116,679	$ 68,200	$ 68,200	$ (9,227)	$ (9,227)	$ 2,115	$ (22)	$ 2,093	$ (6,902)	$ (6,902)	$ 62,750	$ (240)	$ 62,510	$ 116,936	$ (262)	$ 116,674	$ 5	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	(2,176)							(13,163)					10,987			(2,176)
Net income	10,987												10,987			10,987
Other comprehensive income (loss)	(13,163)							(13,163)								(13,163)
Issuance of common stock in relation to SARs exercised (in shares)				2,026
Issuance of common stock in relation to SARs exercised	0
Stock-based compensation	303										303					303
Dividends declared on ordinary shares	(6,015)												(6,015)			(6,015)
Ordinary shares repurchased and cancelled (in shares)				(3,039)
Ordinary shares repurchased and cancelled	(1,678)			$ (1,678)												(1,678)
Purchases of treasury stock	(8,088)					(8,088)										(8,088)
Ending balance (in shares) at Mar. 31, 2020				600,934
Ending 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]
Total comprehensive income	27,589							12,994					14,595			27,589
Net income	14,595												14,595			14,595
Other comprehensive income (loss)	12,994							12,994								12,994
Issuance of common stock in relation to SARs exercised (in shares)				4,645
Issuance of common stock in relation to SARs exercised	879			$ 879												879
Stock-based compensation	1,273										1,273					1,273
Dividends declared on ordinary shares	$ (5,367)												(5,367)			(5,367)
Ending balance (in shares) at Mar. 31, 2021	605,600			605,579
Ending 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]
Total comprehensive income	10,932							1,985					8,947			10,932
Net income	8,947												8,947			8,947
Other comprehensive income (loss)	1,984							1,985								1,985
Issuance of common stock in relation to SARs exercised (in shares)				5,618
Issuance of common stock in relation to SARs exercised	0
Stock-based compensation	1,325										1,325					1,325
Dividends declared on ordinary shares	(5,948)												(5,948)			(5,948)
Ordinary shares repurchased and cancelled (in shares)				(6,020)
Ordinary shares repurchased and cancelled	$ (3,011)			$ (3,011)												(3,011)
Ending balance (in shares) at Mar. 31, 2022	605,200			605,177
Ending balance at Mar. 31, 2022	$ 126,697			$ 64,390		$ (17,315)		$ 3,909			$ (4,001)		$ 79,709			$ 126,692			$ 5