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SEGMENT INFORMATION - Summary of Segment Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues      
Revenue $ 433,893 $ 476,659 $ 313,564
Segment operating profit/(loss) 7,552 (5,333) 6,872
Depreciation and amortization(including depreciation from right of use assets) (5,835) (5,494) (5,402)
Impairment of property, plant and equipment 0 7 202
Interest income 120 123 320
Interest expense (1,488) (1,097) (615)
Income tax expense (2,808) 1,345 (4,016)
Other disclosures      
Capital expenditure 3,808 8,551 14,604
North Asia      
Revenues      
Revenue 77,329 107,032 73,199
Thailand      
Revenues      
Revenue 171,841 197,779 143,647
ROW      
Revenues      
Revenue 184,723 171,848 96,718
Segment operating profit/(loss)      
Revenues      
Segment operating profit/(loss) 10,645 (2,324) 9,845
Depreciation and amortization(including depreciation from right of use assets) (5,753) (5,392) (5,284)
Impairment of property, plant and equipment   7 202
Interest income 119 122 319
Interest expense (1,486) (1,005) (540)
Income tax expense (2,753) 580 (3,849)
Other disclosures      
Capital expenditure 3,807 7,614 14,604
Segment operating profit/(loss) | North Asia      
Revenues      
Segment operating profit/(loss) 241 4,523 3,087
Depreciation and amortization(including depreciation from right of use assets) (1,247) (1,074) (796)
Impairment of property, plant and equipment   0 0
Interest income 68 43 94
Interest expense (91) (285) (178)
Income tax expense (354) (2,104) (791)
Other disclosures      
Capital expenditure 1,486 11 3,763
Segment operating profit/(loss) | Thailand      
Revenues      
Segment operating profit/(loss) 2,636 (13,537) 11,250
Depreciation and amortization(including depreciation from right of use assets) (3,058) (2,752) (2,773)
Impairment of property, plant and equipment   7 4
Interest income 49 76 192
Interest expense (787) (380) (105)
Income tax expense (420) 4,223 (2,344)
Other disclosures      
Capital expenditure 1,780 5,585 10,674
Segment operating profit/(loss) | ROW      
Revenues      
Segment operating profit/(loss) 7,768 6,690 (4,492)
Depreciation and amortization(including depreciation from right of use assets) (1,448) (1,566) (1,715)
Impairment of property, plant and equipment   0 (198)
Interest income 2 3 33
Interest expense (608) (340) (257)
Income tax expense (1,979) (1,539) (714)
Other disclosures      
Capital expenditure 541 2,018 167
Corporate expense adjustments and eliminations      
Revenues      
Segment operating profit/(loss) (3,093) (3,009) (2,973)
Depreciation and amortization(including depreciation from right of use assets) (82) (102) (118)
Impairment of property, plant and equipment   0 0
Interest income 1 1 1
Interest expense (2) (92) (75)
Income tax expense (55) 765 (167)
Other disclosures      
Capital expenditure 1 937 0
External customers      
Revenues      
Revenue 433,893 476,659 313,564
External customers | Segment operating profit/(loss)      
Revenues      
Revenue 433,893 476,659 313,564
External customers | Segment operating profit/(loss) | North Asia      
Revenues      
Revenue 77,329 107,032 73,199
External customers | Segment operating profit/(loss) | Thailand      
Revenues      
Revenue 171,841 197,779 143,647
External customers | Segment operating profit/(loss) | ROW      
Revenues      
Revenue 184,723 171,848 96,718
External customers | Corporate expense adjustments and eliminations      
Revenues      
Revenue 0 0 0
Inter-segment      
Revenues      
Revenue 0 0 0
Inter-segment | Segment operating profit/(loss)      
Revenues      
Revenue (5) 7 0
Inter-segment | Segment operating profit/(loss) | North Asia      
Revenues      
Revenue 0 0 0
Inter-segment | Segment operating profit/(loss) | Thailand      
Revenues      
Revenue (5) 7 0
Inter-segment | Segment operating profit/(loss) | ROW      
Revenues      
Revenue 0 0 0
Inter-segment | Corporate expense adjustments and eliminations      
Revenues      
Revenue $ 5 $ (7) $ 0