Geographic and Other Information - Schedule of Product Categories (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues	$ 44,722	$ 43,438
Power Solution Business [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		45,541
Power Solution Business [Member] | Mixed Signal Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		9,006
Power Solution Business [Member] | Power Analog Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		36,535
Power Solution Business [Member] | Other Solutions Business [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		45,541
Power Solution Business [Member] | Other Solutions Business [Member] | Mixed Signal Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		9,006
Power Solution Business [Member] | Other Solutions Business [Member] | Power Analog Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		36,535
Power Solution Business [Member] | Power Analog Solutions Business [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		36,535
Power Solution Business [Member] | Power Analog Solutions Business [Member] | Mixed Signal Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		0
Power Solution Business [Member] | Power Analog Solutions Business [Member] | Power Analog Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		36,535
Power Solution Business [Member] | Power Ic [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		3,377
Power Solution Business [Member] | Power Ic [Member] | Mixed Signal Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		3,377
Power Solution Business [Member] | Power Ic [Member] | Power Analog Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		0
Power Solution Business [Member] | Discontinued Operation [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		5,629
Power Solution Business [Member] | Discontinued Operation [Member] | Mixed Signal Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		5,629
Power Solution Business [Member] | Discontinued Operation [Member] | Power Analog Solutions [Member]
Segment Reporting Information by Segment for Current Period Presentation [Line Items]
Total revenues		$ 0