v3.26.1
Geographic and Other Information - Net Sales by Region, Based on Location of Products are Billed (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenues $ 44,704 $ 47,622 $ 90,912 $ 92,344
Standard products business [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenues 44,704 47,622 90,912 92,344
Standard products business [Member] | Korea [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenues 18,827 22,721 39,493 44,437
Standard products business [Member] | Asia Pacific (Other Than Korea) [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenues 24,027 22,445 47,614 43,437
Standard products business [Member] | United States [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenues 1,005 1,470 2,244 2,652
Standard products business [Member] | Europe [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenues $ 845 $ 986 $ 1,561 $ 1,818