Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v3.7.0.1
Segment Information (Details)
 3 Months Ended
Mar. 31, 2017
USD ($)
segment
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Segment information      
Number of business segments | segment 4    
Number of operating segments | segment 3    
Net sales revenue:      
Total net sales revenue $ 83,098,000 $ 82,402,000  
Contribution margin:      
Total contribution margin 32,387,000 30,505,000  
Selling, general and administrative 30,336,000 28,385,000  
Operating income 2,051,000 2,120,000  
Other income (expense), net 1,275,000 1,559,000  
Income from continuing operations before provision for income taxes 3,326,000 3,679,000  
Property, plant and equipment      
Total property, plant and equipment 74,733,000   $ 73,272,000
United States      
Net sales revenue:      
Total net sales revenue 37,735,000 38,295,000  
Property, plant and equipment      
Total property, plant and equipment 71,787,000   70,770,000
South Korea      
Net sales revenue:      
Total net sales revenue 11,346,000 13,198,000  
Other      
Net sales revenue:      
Total net sales revenue 34,017,000 30,909,000  
Property, plant and equipment      
Total property, plant and equipment 2,946,000   $ 2,502,000
NSP Americas      
Net sales revenue:      
Total net sales revenue 44,645,000 45,183,000  
Contribution margin:      
Total contribution margin 19,195,000 18,917,000  
NSP Americas | General health      
Net sales revenue:      
Total net sales revenue 19,866,000 19,617,000  
NSP Americas | Immune      
Net sales revenue:      
Total net sales revenue 5,073,000 5,576,000  
NSP Americas | Cardiovascular      
Net sales revenue:      
Total net sales revenue 3,316,000 3,112,000  
NSP Americas | Digestive      
Net sales revenue:      
Total net sales revenue 12,148,000 13,079,000  
NSP Americas | Personal care      
Net sales revenue:      
Total net sales revenue 1,886,000 930,000  
NSP Americas | Weight management      
Net sales revenue:      
Total net sales revenue 2,356,000 2,869,000  
NSP Russia, Central and Eastern Europe      
Net sales revenue:      
Total net sales revenue 7,607,000 6,352,000  
Contribution margin:      
Total contribution margin 2,509,000 2,181,000  
NSP Russia, Central and Eastern Europe | General health      
Net sales revenue:      
Total net sales revenue 3,558,000 2,723,000  
NSP Russia, Central and Eastern Europe | Immune      
Net sales revenue:      
Total net sales revenue 763,000 540,000  
NSP Russia, Central and Eastern Europe | Cardiovascular      
Net sales revenue:      
Total net sales revenue 531,000 477,000  
NSP Russia, Central and Eastern Europe | Digestive      
Net sales revenue:      
Total net sales revenue 1,877,000 2,121,000  
NSP Russia, Central and Eastern Europe | Personal care      
Net sales revenue:      
Total net sales revenue 608,000 249,000  
NSP Russia, Central and Eastern Europe | Weight management      
Net sales revenue:      
Total net sales revenue 270,000 242,000  
Synergy WorldWide      
Net sales revenue:      
Total net sales revenue 27,313,000 29,848,000  
Contribution margin:      
Total contribution margin 8,199,000 8,939,000  
Synergy WorldWide | General health      
Net sales revenue:      
Total net sales revenue 6,687,000 8,640,000  
Synergy WorldWide | Immune      
Net sales revenue:      
Total net sales revenue 121,000 209,000  
Synergy WorldWide | Cardiovascular      
Net sales revenue:      
Total net sales revenue 11,103,000 12,693,000  
Synergy WorldWide | Digestive      
Net sales revenue:      
Total net sales revenue 3,465,000 2,487,000  
Synergy WorldWide | Personal care      
Net sales revenue:      
Total net sales revenue 2,067,000 1,939,000  
Synergy WorldWide | Weight management      
Net sales revenue:      
Total net sales revenue 3,870,000 3,880,000  
China and New Markets      
Net sales revenue:      
Total net sales revenue 3,533,000 1,019,000  
Contribution margin:      
Total contribution margin 2,484,000 468,000  
China and New Markets | General health      
Net sales revenue:      
Total net sales revenue 880,000 471,000  
China and New Markets | Immune      
Net sales revenue:      
Total net sales revenue 146,000 131,000  
China and New Markets | Cardiovascular      
Net sales revenue:      
Total net sales revenue 581,000 73,000  
China and New Markets | Digestive      
Net sales revenue:      
Total net sales revenue 1,642,000 260,000  
China and New Markets | Personal care      
Net sales revenue:      
Total net sales revenue 76,000 22,000  
China and New Markets | Weight management      
Net sales revenue:      
Total net sales revenue 208,000 62,000  
Selling, General and Administrative Expenses | China and New Markets      
Property, plant and equipment      
Service fees $ 900,000 $ 0