CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues:
Net sales	$ 45,946	$ 55,434	$ 138,290	$ 145,272
Cost of sales:
Cost of sales	37,405	43,928	110,675	117,621
Gross profit	8,541	11,506	27,615	27,651
Operating expenses:
Selling, general and administrative expenses	8,312	9,521	26,491	28,341
Research and development expenses	7,773	6,472	19,698	18,455
Early Termination And Other Charges	3,994	0	4,840	0
Total operating expenses	20,079	15,993	51,029	46,796
Operating loss	(11,538)	(4,487)	(23,414)	(19,145)
Interest income	1,255	1,939	4,117	6,214
Interest expense	(469)	(472)	(1,265)	(1,143)
Foreign currency gain (loss), net	(4,280)	5,247	6,112	(3,388)
Other income (expense), net	253	(31)	284	121
Income (Loss) from continuing operations before income tax expense (benefit), net	(14,779)	2,196	(14,166)	(17,341)
Income tax expense (benefit), net	(4,170)	6,117	(8,709)	2,267
Loss from continuing operations	(10,609)	(3,921)	(5,457)	(19,608)
Loss from discontinued operations, net of tax	(2,481)	(5,696)	(16,188)	(18,423)
Net loss	$ (13,090)	$ (9,617)	$ (21,645)	$ (38,031)
Basic loss per common share—
Basic	$ (0.36)	$ (0.26)	$ (0.6)	$ (1)
Continuing operations	(0.29)	(0.11)	(0.15)	(0.52)
Discontinued operations	(0.07)	(0.15)	(0.45)	(0.48)
Diluted loss per common share—
Diluted	(0.36)	(0.26)	(0.6)	(1)
Continuing operations	(0.29)	(0.11)	(0.15)	(0.52)
Discontinued operations	$ (0.07)	$ (0.15)	$ (0.45)	$ (0.48)
Weighted average number of shares—
Basic	35,934,406	37,468,849	36,298,491	38,060,682
Diluted	35,934,406	37,468,849	36,298,491	38,060,682
Power Solutions Business [Member]
Revenues:
Net sales	$ 45,946	$ 52,994	$ 138,290	$ 136,970
Cost of sales:
Cost of sales	37,405	41,329	110,675	108,354
Gross profit	8,541	11,665	27,615	28,616
Fab 3 Foundry Services [Member]
Revenues:
Net sales	0	2,440	0	8,302
Cost of sales:
Cost of sales	0	2,599	0	9,267
Gross profit	$ 0	$ (159)	$ 0	$ (965)

Early termination and other charges.

No definition available.

Name:	mx_EarlyTerminationAndOtherCharges
Namespace Prefix:	mx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.