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OPERATING BUSINESS SEGMENT AND INTERNATIONAL OPERATION INFORMATION (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Net sales: |  |
Total net sales | $ 444,084 | $ 385,205
Contribution margin: |  |
Total contribution margin | 188,773 | 152,779
Selling, general and administrative | 154,103 | 131,297
Operating income | 34,670 | 21,482
Other income (loss), net | (2,848) | 1,339
Income before provision for income taxes | 31,822 | 22,821
Capital expenditures: |  |
Total capital expenditures | 6,666 | 4,905
Depreciation and amortization: |  |
Total depreciation and amortization | 11,162 | 10,743
Assets: |  |
Total assets | 258,874 | 249,498
Property, plant and equipment, net |  |
Total property, plant and equipment | 50,857 | 54,355
Asia |  |
Net sales: |  |
Total net sales | 176,860 | 138,717
Contribution margin: |  |
Total contribution margin | 89,939 | 66,801
Capital expenditures: |  |
Total capital expenditures | 1,081 | 542
Depreciation and amortization: |  |
Total depreciation and amortization | 1,825 | 1,919
Assets: |  |
Total assets | 104,659 | 82,572
Asia | General health |  |
Net sales: |  |
Total net sales | 50,044 | 36,445
Asia | Immunity |  |
Net sales: |  |
Total net sales | 1,599 | 847
Asia | Cardiovascular |  |
Net sales: |  |
Total net sales | 48,019 | 40,496
Asia | Digestive |  |
Net sales: |  |
Total net sales | 36,069 | 32,605
Asia | Personal care |  |
Net sales: |  |
Total net sales | 17,765 | 10,606
Asia | Weight management |  |
Net sales: |  |
Total net sales | 23,364 | 17,718
Europe |  |
Net sales: |  |
Total net sales | 91,539 | 77,688
Contribution margin: |  |
Total contribution margin | 30,959 | 26,014
Capital expenditures: |  |
Total capital expenditures | 142 | 34
Depreciation and amortization: |  |
Total depreciation and amortization | 64 | 77
Assets: |  |
Total assets | 15,486 | 16,398
Europe | General health |  |
Net sales: |  |
Total net sales | 40,045 | 32,822
Europe | Immunity |  |
Net sales: |  |
Total net sales | 8,957 | 8,231
Europe | Cardiovascular |  |
Net sales: |  |
Total net sales | 11,787 | 10,863
Europe | Digestive |  |
Net sales: |  |
Total net sales | 23,142 | 18,673
Europe | Personal care |  |
Net sales: |  |
Total net sales | 5,149 | 4,663
Europe | Weight management |  |
Net sales: |  |
Total net sales | 2,459 | 2,436
North America |  |
Net sales: |  |
Total net sales | 149,746 | 145,481
Contribution margin: |  |
Total contribution margin | 56,922 | 50,193
Capital expenditures: |  |
Total capital expenditures | 5,371 | 4,267
Depreciation and amortization: |  |
Total depreciation and amortization | 9,206 | 8,673
Assets: |  |
Total assets | 131,207 | 142,324
North America | General health |  |
Net sales: |  |
Total net sales | 65,379 | 61,897
North America | Immunity |  |
Net sales: |  |
Total net sales | 19,563 | 23,036
North America | Cardiovascular |  |
Net sales: |  |
Total net sales | 16,219 | 15,852
North America | Digestive |  |
Net sales: |  |
Total net sales | 37,130 | 32,851
North America | Personal care |  |
Net sales: |  |
Total net sales | 7,579 | 7,587
North America | Weight management |  |
Net sales: |  |
Total net sales | 3,876 | 4,258
Latin America and Other |  |
Net sales: |  |
Total net sales | 25,939 | 23,319
Contribution margin: |  |
Total contribution margin | 10,953 | 9,771
Capital expenditures: |  |
Total capital expenditures | 72 | 62
Depreciation and amortization: |  |
Total depreciation and amortization | 67 | 74
Assets: |  |
Total assets | 7,522 | 8,204
Latin America and Other | General health |  |
Net sales: |  |
Total net sales | 7,532 | 6,867
Latin America and Other | Immunity |  |
Net sales: |  |
Total net sales | 2,667 | 3,122
Latin America and Other | Cardiovascular |  |
Net sales: |  |
Total net sales | 2,001 | 1,512
Latin America and Other | Digestive |  |
Net sales: |  |
Total net sales | 10,291 | 9,863
Latin America and Other | Personal care |  |
Net sales: |  |
Total net sales | 2,573 | 1,203
Latin America and Other | Weight management |  |
Net sales: |  |
Total net sales | 875 | 752
China |  |
Contribution margin: |  |
Selling, general and administrative | 18,700 | 11,700
United States |  |
Net sales: |  |
Total net sales | 138,174 | 134,976
Property, plant and equipment, net |  |
Total property, plant and equipment | 46,595 | 50,025
South Korea |  |
Net sales: |  |
Total net sales | 61,107 | 62,041
Other |  |
Net sales: |  |
Total net sales | 244,803 | 188,188
Property, plant and equipment, net |  |
Total property, plant and equipment | $ 4,262 | $ 4,330

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