XML 85 R73.htm IDEA: XBRL DOCUMENT v3.22.1
Segment Information - Revenue From External Customers Based Major Categories (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Geographical Areas [Line Items]      
Revenue $ 476,659 $ 313,564 $ 338,160
At a point in time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 451,567 302,712 331,190
Over time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 25,092 10,852 6,970
North Asia (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 107,032 73,199 76,575
North Asia (Segment) [Member] | At a point in time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 107,032 73,199 76,575
Thailand (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 197,779 143,647 172,379
Thailand (Segment) [Member] | At a point in time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 197,544 143,463 172,031
Thailand (Segment) [Member] | Over time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 235 184 348
ROW (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 171,848 96,718 89,206
ROW (Segment) [Member] | At a point in time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 146,991 86,050 82,584
ROW (Segment) [Member] | Over time [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 24,857 10,668 6,622
Power [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 191,520 127,630 128,179
Power [Member] | Thailand (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 63,629 48,851 49,493
Power [Member] | ROW (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 127,891 78,779 78,686
Enamel [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 212,776 131,150 179,572
Enamel [Member] | North Asia (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 107,027 73,179 76,575
Enamel [Member] | Thailand (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 105,749 57,971 102,997
SDI [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 39,476 15,600 7,600
SDI [Member] | ROW (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 39,476    
Others [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 32,887 21,683 30,409
Others [Member] | North Asia (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 5 20  
Others [Member] | Thailand (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue 28,401 3,724 19,889
Others [Member] | ROW (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue $ 4,481 17,939 $ 10,520
Fabrication [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue   33,101  
Fabrication [Member] | Thailand (Segment) [Member]      
Disclosure Of Geographical Areas [Line Items]      
Revenue   $ 33,101