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Segment Information - Summary of Segment Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues |  |  |
Revenue | $ 476,659 | $ 313,564 | $ 338,160
Segment operating profit/(loss) | (5,333) | 6,872 | (264)
Depreciation and amortization(Included depreciation from right of use assets) | (5,494) | (5,402) | (5,324)
Depreciation from right of use assets | (661) | (621) | (507)
Impairment of property, plant and equipment | (7) | (202) | (546)
Interest income | 123 | 320 | 506
Interest expense | (1,097) | (615) | (845)
Income tax (expense)/benefit | 1,345 | (4,016) | (2,057)
Other disclosures |  |  |
Capital expenditure | 8,551 | 14,604 | 5,462
Total assets | 389,428 | 338,119 |
Total liabilities | 180,111 | 103,244 |
North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 107,032 | 73,199 | 76,575
Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 197,779 | 143,647 | 172,379
ROW (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 171,848 | 96,718 | 89,206
Operating segments [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | (2,324) | 9,845 | 2,620
Depreciation and amortization(Included depreciation from right of use assets) | (5,392) | (5,284) | (5,266)
Depreciation from right of use assets | (590) | (550) | (485)
Impairment of property, plant and equipment | (7) | (202) | (546)
Interest income | 122 | 319 | 505
Interest expense | (1,005) | (540) | (822)
Income tax (expense)/benefit | 580 | (3,849) | (1,691)
Other disclosures |  |  |
Capital expenditure | 7,614 | 14,604 | 5,384
Total assets | 379,179 | 327,226 |
Total liabilities | 172,507 | 89,690 |
Operating segments [Member] | North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | 4,523 | 3,087 | 1,237
Depreciation and amortization(Included depreciation from right of use assets) | (1,074) | (796) | (811)
Depreciation from right of use assets | (36) | (46) | (44)
Impairment of property, plant and equipment | 0 | 0 | (549)
Interest income | 43 | 94 | 57
Interest expense | (285) | (178) | (239)
Income tax (expense)/benefit | (2,104) | (791) | (561)
Other disclosures |  |  |
Capital expenditure | 11 | 3,763 | 552
Total assets | 56,629 | 52,436 |
Total liabilities | 15,166 | 12,647 |
Operating segments [Member] | Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | (13,537) | 11,250 | 3,042
Depreciation and amortization(Included depreciation from right of use assets) | (2,752) | (2,773) | (2,842)
Depreciation from right of use assets | 0 | 0 | 0
Impairment of property, plant and equipment | (7) | (4) | 3
Interest income | 76 | 192 | 403
Interest expense | (380) | (105) | (481)
Income tax (expense)/benefit | 4,223 | (2,344) | (1,235)
Other disclosures |  |  |
Capital expenditure | 5,585 | 10,674 | 4,590
Total assets | 186,405 | 173,967 |
Total liabilities | 76,610 | 29,911 |
Operating segments [Member] | ROW (Segment) [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | 6,690 | (4,492) | (1,659)
Depreciation and amortization(Included depreciation from right of use assets) | (1,566) | (1,715) | (1,613)
Depreciation from right of use assets | (554) | (504) | (441)
Impairment of property, plant and equipment | 0 | (198) | 0
Interest income | 3 | 33 | 45
Interest expense | (340) | (257) | (102)
Income tax (expense)/benefit | (1,539) | (714) | 105
Other disclosures |  |  |
Capital expenditure | 2,018 | 167 | 242
Total assets | 136,145 | 100,823 |
Total liabilities | 80,731 | 47,132 |
Corporate expense adjustments and eliminations [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | (3,009) | (2,973) | (2,884)
Depreciation and amortization(Included depreciation from right of use assets) | (102) | (118) | (58)
Depreciation from right of use assets | (71) | (71) | (22)
Impairment of property, plant and equipment | 0 | 0 | 0
Interest income | 1 | 1 | 1
Interest expense | (92) | (75) | (23)
Income tax (expense)/benefit | 765 | (167) | (366)
Other disclosures |  |  |
Capital expenditure | 937 | 0 | 78
Total assets | 10,249 | 10,893 |
Total liabilities | 7,604 | 13,554 |
External customers [Member] |  |  |
Revenues |  |  |
Revenue | 476,659 | 313,564 | 338,160
External customers [Member] | Operating segments [Member] |  |  |
Revenues |  |  |
Revenue | 476,659 | 313,564 | 338,160
External customers [Member] | Operating segments [Member] | North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 107,032 | 73,199 | 76,575
External customers [Member] | Operating segments [Member] | Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 197,779 | 143,647 | 172,379
External customers [Member] | Operating segments [Member] | ROW (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 171,848 | 96,718 | 89,206
External customers [Member] | Corporate expense adjustments and eliminations [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 0
Intersegment [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 0
Intersegment [Member] | Operating segments [Member] |  |  |
Revenues |  |  |
Revenue | 7 | 0 | 6
Intersegment [Member] | Operating segments [Member] | North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 0
Intersegment [Member] | Operating segments [Member] | Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 7 | 0 | 6
Intersegment [Member] | Operating segments [Member] | ROW (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 0
Intersegment [Member] | Corporate expense adjustments and eliminations [Member] |  |  |
Revenues |  |  |
Revenue | $ (7) | $ 0 | $ (6)

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