Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v3.8.0.1
Segment Information (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
segment
Sep. 30, 2016
USD ($)
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 $ 89,301 $ 85,441 $ 253,743 $ 257,209  
Contribution margin:          
Total contribution margin 35,080 34,245 99,326 100,247  
Selling, general and administrative 32,926 29,187 95,098 88,821  
Operating income 2,154 5,058 4,228 11,426  
Other income, net 193 20 1,909 957  
Income before provision for income taxes 2,347 5,078 6,137 12,383  
Property, plant and equipment          
Total property, plant and equipment 70,175   70,175   $ 73,272
United States          
Net sales revenue:          
Total net sales revenue 35,124 36,473 106,664 112,366  
Property, plant and equipment          
Total property, plant and equipment 67,454   67,454   70,770
South Korea (Synergy)          
Net sales revenue:          
Total net sales revenue 14,371 14,083 38,203 42,754  
Other          
Net sales revenue:          
Total net sales revenue 39,806 34,885 108,876 102,089  
Property, plant and equipment          
Total property, plant and equipment 2,721   2,721   $ 2,502
NSP Americas          
Net sales revenue:          
Total net sales revenue 41,301 43,260 125,367 133,168  
Contribution margin:          
Total contribution margin 17,764 19,057 53,454 57,077  
NSP Americas | General health          
Net sales revenue:          
Total net sales revenue 18,211 19,063 56,258 58,914  
NSP Americas | Immune          
Net sales revenue:          
Total net sales revenue 4,938 4,599 13,180 13,913  
NSP Americas | Cardiovascular          
Net sales revenue:          
Total net sales revenue 3,434 3,193 9,570 9,723  
NSP Americas | Digestive          
Net sales revenue:          
Total net sales revenue 11,084 11,684 34,892 36,608  
NSP Americas | Personal care          
Net sales revenue:          
Total net sales revenue 2,114 1,925 5,487 5,708  
NSP Americas | Weight management          
Net sales revenue:          
Total net sales revenue 1,520 2,796 5,980 8,302  
NSP Russia, Central and Eastern Europe          
Net sales revenue:          
Total net sales revenue 7,129 6,421 21,398 19,042  
Contribution margin:          
Total contribution margin 2,335 2,231 7,090 6,477  
NSP Russia, Central and Eastern Europe | General health          
Net sales revenue:          
Total net sales revenue 3,192 2,732 9,691 7,956  
NSP Russia, Central and Eastern Europe | Immune          
Net sales revenue:          
Total net sales revenue 789 650 2,190 2,047  
NSP Russia, Central and Eastern Europe | Cardiovascular          
Net sales revenue:          
Total net sales revenue 542 538 1,553 1,508  
NSP Russia, Central and Eastern Europe | Digestive          
Net sales revenue:          
Total net sales revenue 1,983 1,741 5,890 5,269  
NSP Russia, Central and Eastern Europe | Personal care          
Net sales revenue:          
Total net sales revenue 443 517 1,475 1,619  
NSP Russia, Central and Eastern Europe | Weight management          
Net sales revenue:          
Total net sales revenue 180 243 599 643  
Synergy WorldWide          
Net sales revenue:          
Total net sales revenue 34,470 31,331 92,146 94,192  
Contribution margin:          
Total contribution margin 10,160 9,556 27,769 28,740  
Synergy WorldWide | General health          
Net sales revenue:          
Total net sales revenue 9,268 8,711 23,579 27,045  
Synergy WorldWide | Immune          
Net sales revenue:          
Total net sales revenue 119 205 357 455  
Synergy WorldWide | Cardiovascular          
Net sales revenue:          
Total net sales revenue 14,369 13,188 38,075 39,386  
Synergy WorldWide | Digestive          
Net sales revenue:          
Total net sales revenue 4,428 3,383 12,047 9,312  
Synergy WorldWide | Personal care          
Net sales revenue:          
Total net sales revenue 1,891 1,838 5,884 5,725  
Synergy WorldWide | Weight management          
Net sales revenue:          
Total net sales revenue 4,395 4,006 12,204 12,269  
China and New Markets          
Net sales revenue:          
Total net sales revenue 6,401 4,429 14,832 10,807  
Contribution margin:          
Total contribution margin 4,821 3,401 11,013 7,953  
China and New Markets | General health          
Net sales revenue:          
Total net sales revenue 1,409 575 3,374 2,583  
China and New Markets | Immune          
Net sales revenue:          
Total net sales revenue 251 206 517 553  
China and New Markets | Cardiovascular          
Net sales revenue:          
Total net sales revenue 961 948 2,514 2,471  
China and New Markets | Digestive          
Net sales revenue:          
Total net sales revenue 2,559 2,118 6,014 3,640  
China and New Markets | Personal care          
Net sales revenue:          
Total net sales revenue 144 189 265 650  
China and New Markets | Weight management          
Net sales revenue:          
Total net sales revenue 1,077 393 2,148 910  
China and New Markets | Hong Kong          
Contribution margin:          
Selling, general and administrative $ 2,100 $ 1,500 $ 4,700 $ 3,400