Revenues - Summary of Net Revenues Disaggregated by Category (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 407,701	$ 407,701	$ 359,058	$ 405,059
Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		159,139	161,729	181,166
Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		248,562	197,329	223,893
Direct Customers, Contract Manufacturers and Non-stocking Distributors [Member]
Disaggregation of Revenue [Line Items]
Revenue		234,520	201,503	276,997
Direct Customers, Contract Manufacturers and Non-stocking Distributors [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		83,012	88,144	113,448
Direct Customers, Contract Manufacturers and Non-stocking Distributors [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		151,508	113,359	163,549
Stocking distributors, net of sales allowances [Member]
Disaggregation of Revenue [Line Items]
Revenue		109,230	103,774	96,437
Stocking distributors, net of sales allowances [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		74,817	72,713	66,544
Stocking distributors, net of sales allowances [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		34,413	31,061	29,893
Non-recurring engineering [Member]
Disaggregation of Revenue [Line Items]
Revenue		5,547	5,746	14,595
Non-recurring engineering [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		1,310	872	1,174
Non-recurring engineering [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		4,237	4,874	13,421
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue		57,384	46,595	15,872
Royalties [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		0	0	0
Royalties [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		57,384	46,595	15,872
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue		1,020	1,440	1,158
Other [Member] | Brick Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		0	0	0
Other [Member] | Advanced Products [Member]
Disaggregation of Revenue [Line Items]
Revenue		$ 1,020	$ 1,440	$ 1,158