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OPERATING BUSINESS SEGMENT AND INTERNATIONAL OPERATION INFORMATION (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 item | Dec. 31, 2011 | Dec. 31, 2010
Segment information |  |  |  |  |  |  |  |  |  |  |
Number of business segments |  |  |  |  |  |  |  |  | 3 |  |
Number of operating business segments |  |  |  |  |  |  |  |  | 2 |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue | $ 90,377 | $ 91,232 | $ 92,991 | $ 92,868 | $ 92,056 | $ 91,102 | $ 91,811 | $ 92,844 | $ 367,468 | $ 367,813 | $ 349,918
Contribution margin: |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  | 35,250 | 37,204 | 35,848 | 36,898 | 36,614 | 36,575 | 35,249 | 140,877 | 144,521 | 130,287
Selling, general and administrative | 27,719 | 26,228 | 26,530 | 26,384 | 27,086 | 26,767 | 28,329 | 27,424 | 106,861 | 109,606 | 119,024
Contract termination costs |  |  |  |  |  | 14,750 |  |  |  | 14,750 |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |
Total operating income | 5,826 | 8,705 | 10,311 | 9,174 | 9,597 | (5,105) | 8,052 | 7,621 | 34,016 | 20,165 | 11,263
Other Income, net | 1,639 | (214) | 165 | (110) | 798 | 1,204 | (420) | 265 | 1,480 | 1,847 | 2,727
Income before provision for income taxes | 7,465 | 8,491 | 10,476 | 9,064 | 10,395 | (3,901) | 7,632 | 7,886 | 35,496 | 22,012 | 13,990
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 6,779 | 2,242 | 2,677
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  | 4,078 | 4,362 | 4,254
Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 193,919 |  |  |  | 175,811 |  |  |  | 193,919 | 175,811 |
Property, plant and equipment: |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 27,950 |  |  |  | 25,137 |  |  |  | 27,950 | 25,137 |
Number of historical operating segments |  |  |  |  |  |  |  |  | 2 |  |
Number of operating segments reevaluated |  |  |  |  |  |  |  |  | 3 |  |
United States |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 154,716 | 159,471 | 156,767
Property, plant and equipment: |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 20,923 |  |  |  | 18,119 |  |  |  | 20,923 | 18,119 |
Other |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 212,752 | 208,342 | 193,151
Property, plant and equipment: |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 3,492 |  |  |  | 3,079 |  |  |  | 3,492 | 3,079 |
Venezuela |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment: |  |  |  |  |  |  |  |  |  |  |
Total property, plant and equipment | 3,535 |  |  |  | 3,939 |  |  |  | 3,535 | 3,939 |
NSP Americas, Asia Pacific and Europe |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 208,945 | 216,912 | 225,213
Contribution margin: |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  | 82,778 | 86,004 | 86,570
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 5,684 | 993 | 1,898
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  | 3,339 | 3,827 | 3,721
Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 136,237 |  |  |  | 124,483 |  |  |  | 136,237 | 124,483 |
NSP Americas, Asia Pacific and Europe | Herbal Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 118,211 | 121,907 | 118,531
NSP Americas, Asia Pacific and Europe | Vitamin, Mineral and Other Nutritional Supplements |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 80,567 | 81,974 | 91,852
NSP Americas, Asia Pacific and Europe | Personal Care Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 6,150 | 7,503 | 7,924
NSP Americas, Asia Pacific and Europe | Other Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 4,017 | 5,528 | 6,906
NSP Russia, Central and Eastern Europe |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 57,853 | 56,986 | 56,141
Contribution margin: |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  | 21,957 | 22,374 | 20,755
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 44 | 66 |
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  | 36 | 43 | 23
Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 8,558 |  |  |  | 9,030 |  |  |  | 8,558 | 9,030 |
NSP Russia, Central and Eastern Europe | Herbal Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 25,311 | 25,120 | 26,867
NSP Russia, Central and Eastern Europe | Vitamin, Mineral and Other Nutritional Supplements |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 26,147 | 24,202 | 24,416
NSP Russia, Central and Eastern Europe | Personal Care Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 6,203 | 7,479 | 4,638
NSP Russia, Central and Eastern Europe | Other Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 192 | 185 | 220
Synergy WorldWide |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 100,670 | 93,915 | 68,564
Contribution margin: |  |  |  |  |  |  |  |  |  |  |
Total contribution margin |  |  |  |  |  |  |  |  | 36,142 | 36,143 | 22,962
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 1,051 | 1,183 | 779
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |
Total depreciation and amortization |  |  |  |  |  |  |  |  | 703 | 492 | 510
Assets: |  |  |  |  |  |  |  |  |  |  |
Total Assets | 49,124 |  |  |  | 42,298 |  |  |  | 49,124 | 42,298 |
Synergy WorldWide | Herbal Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 39,607 | 33,563 | 28,045
Synergy WorldWide | Vitamin, Mineral and Other Nutritional Supplements |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 54,128 | 50,936 | 32,296
Synergy WorldWide | Personal Care Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | 5,350 | 7,526 | 6,542
Synergy WorldWide | Other Products |  |  |  |  |  |  |  |  |  |  |
Net sales revenue: |  |  |  |  |  |  |  |  |  |  |
Total net sales revenue |  |  |  |  |  |  |  |  | $ 1,585 | $ 1,890 | $ 1,681

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