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OPERATING BUSINESS SEGMENT AND INTERNATIONAL OPERATION INFORMATION (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Sep. 30, 2014 USD ($) | Dec. 31, 2016 USD ($) segment | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Segment information |  |  |  |  |  |  |  |  |  |  |  |
Number of business segments | segment |  |  |  |  |  |  |  |  |  | 4 |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue | $ 83,950,000 | $ 85,441,000 | $ 89,366,000 | $ 82,402,000 | $ 79,994,000 | $ 79,586,000 | $ 81,247,000 | $ 83,878,000 |  | $ 341,159,000 | $ 324,705,000 | $ 366,367,000
Contribution margin: |  |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  |  | 130,312,000 | 121,574,000 | 138,975,000
Selling, general and administrative | 31,452,000 | 29,187,000 | 31,249,000 | 28,385,000 | 26,865,000 | 27,115,000 | 27,392,000 | 26,330,000 |  | 120,273,000 | 107,702,000 | 119,927,000
Operating income | (1,387,000) | 5,058,000 | 4,248,000 | 2,120,000 | 2,220,000 | 3,138,000 | 3,184,000 | 5,330,000 |  | 10,039,000 | 13,872,000 | 19,048,000
Other income (expense) | (1,730,000) | 20,000 | (622,000) | 1,559,000 | (25,000) | (247,000) | (2,000) | (318,000) |  | (773,000) | (592,000) | (34,000)
Income from continuing operations before provision for income taxes | (3,117,000) | $ 5,078,000 | $ 3,626,000 | $ 3,679,000 | 2,195,000 | $ 2,891,000 | $ 3,182,000 | $ 5,012,000 |  | 9,266,000 | 13,280,000 | 19,014,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  |  | 10,124,000 | 22,226,000 | 26,910,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  |  | 4,808,000 | 4,525,000 | 4,409,000
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 205,570,000 |  |  |  | 200,520,000 |  |  |  |  | 205,570,000 | 200,520,000 |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 73,272,000 |  |  |  | 68,728,000 |  |  |  |  | 73,272,000 | 68,728,000 |
Impairment charge |  |  |  |  |  |  |  |  |  | 221,000 | 0 | 2,947,000
Subsidiary in Venezuela |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment |  |  |  |  |  |  |  |  | $ 0 |  |  |
Impairment charge |  |  |  |  |  |  |  |  | $ 2,900,000 |  |  |
United States |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 148,060,000 | 147,553,000 | 148,219,000
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 70,770,000 |  |  |  | 66,044,000 |  |  |  |  | 70,770,000 | 66,044,000 |
South Korea |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 57,637,000 | 48,476,000 | 54,314,000
Other |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 135,462,000 | 128,676,000 | 163,834,000
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 2,502,000 |  |  |  | 2,684,000 |  |  |  |  | $ 2,502,000 | 2,684,000 |
Nature's Sunshine Products |  |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |  |
Number of business segments | segment |  |  |  |  |  |  |  |  |  | 3 |  |
NSP Americas |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | $ 175,922,000 | 179,151,000 | 182,395,000
Contribution margin: |  |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  |  | 75,005,000 | 74,953,000 | 74,603,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  |  | 8,999,000 | 21,437,000 | 25,581,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  |  | 3,997,000 | 3,603,000 | 3,438,000
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 146,761,000 |  |  |  | 141,428,000 |  |  |  |  | 146,761,000 | 141,428,000 |
NSP Americas | General health |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 78,187,000 | 80,315,000 | 78,218,000
NSP Americas | Immune |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 19,185,000 | 22,042,000 | 23,549,000
NSP Americas | Cardiovascular |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 12,677,000 | 12,331,000 | 12,566,000
NSP Americas | Digestive |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 47,659,000 | 49,239,000 | 53,133,000
NSP Americas | Personal care |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 7,537,000 | 3,575,000 | 4,000,000
NSP Americas | Weight management |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 10,677,000 | 11,649,000 | 10,929,000
NSP Russia, Central and Eastern Europe |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 25,971,000 | 27,408,000 | 50,274,000
Contribution margin: |  |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  |  | 8,604,000 | 9,474,000 | 17,851,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  |  | 131,000 | 0 | 8,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  |  | 42,000 | 26,000 | 25,000
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 6,106,000 |  |  |  | 5,122,000 |  |  |  |  | 6,106,000 | 5,122,000 |
NSP Russia, Central and Eastern Europe | General health |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 11,059,000 | 11,433,000 | 18,841,000
NSP Russia, Central and Eastern Europe | Immune |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 2,898,000 | 3,328,000 | 6,512,000
NSP Russia, Central and Eastern Europe | Cardiovascular |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 1,918,000 | 1,714,000 | 3,104,000
NSP Russia, Central and Eastern Europe | Digestive |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 7,003,000 | 7,167,000 | 13,171,000
NSP Russia, Central and Eastern Europe | Personal care |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 2,202,000 | 2,716,000 | 6,073,000
NSP Russia, Central and Eastern Europe | Weight management |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 891,000 | 1,050,000 | 2,573,000
Synergy WorldWide |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 124,793,000 | 114,081,000 | 128,101,000
Contribution margin: |  |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  |  | 38,034,000 | 35,277,000 | 43,888,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  |  | 564,000 | 302,000 | 1,321,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  |  | 713,000 | 885,000 | 946,000
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | 39,083,000 |  |  |  | 38,048,000 |  |  |  |  | 39,083,000 | 38,048,000 |
Synergy WorldWide | General health |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 35,283,000 | 43,829,000 | 46,546,000
Synergy WorldWide | Immune |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 620,000 | 752,000 | 974,000
Synergy WorldWide | Cardiovascular |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 51,684,000 | 34,191,000 | 42,449,000
Synergy WorldWide | Digestive |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 12,536,000 | 17,746,000 | 20,839,000
Synergy WorldWide | Personal care |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 8,981,000 | 5,697,000 | 7,196,000
Synergy WorldWide | Weight management |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 15,689,000 | 11,866,000 | 10,097,000
China and New Markets |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 14,473,000 | 4,065,000 | 5,597,000
Contribution margin: |  |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  |  | 8,669,000 | 1,870,000 | 2,633,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  |  | 430,000 | 487,000 | 0
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  |  | 56,000 | 11,000 | 0
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | $ 13,620,000 |  |  |  | $ 15,922,000 |  |  |  |  | 13,620,000 | 15,922,000 |
China and New Markets | General health |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 3,399,000 | 1,903,000 | 2,370,000
China and New Markets | Immune |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 821,000 | 525,000 | 777,000
China and New Markets | Cardiovascular |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 2,911,000 | 292,000 | 334,000
China and New Markets | Digestive |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 5,329,000 | 1,011,000 | 1,608,000
China and New Markets | Personal care |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 797,000 | 93,000 | 108,000
China and New Markets | Weight management |  |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  |  | 1,216,000 | 241,000 | 400,000
Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |  |  |
Contribution margin: |  |  |  |  |  |  |  |  |  |  |  |
Service fees |  |  |  |  |  |  |  |  |  | $ 4,300,000 | $ 0 | $ 0

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