Annual report pursuant to Section 13 and 15(d)

Note 10 - Net Sales by Market (Details)

v2.4.1.9
Note 10 - Net Sales by Market (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Net sales from external customers:    
Net sales from external customers $ 124,590us-gaap_SalesRevenueGoodsNet $ 52,527us-gaap_SalesRevenueGoodsNet
CHINA    
Net sales from external customers:    
Net sales from external customers 1,538us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_CN
791us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_CN
HONG KONG    
Net sales from external customers:    
Net sales from external customers 111,028us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_HK
40,585us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_HK
Korea (South), Won    
Net sales from external customers:    
Net sales from external customers 1,009us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= currency_KRW
702us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= currency_KRW
TAIWAN, PROVINCE OF CHINA    
Net sales from external customers:    
Net sales from external customers 4,628us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_TW
3,387us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_TW
UNITED STATES    
Net sales from external customers:    
Net sales from external customers 1,438us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_US
2,289us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= country_US
Canada [Member]    
Net sales from external customers:    
Net sales from external customers 1,374us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= nhtc_CanadaMember
72us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= nhtc_CanadaMember
Other Foreign Countries [Member]    
Net sales from external customers:    
Net sales from external customers 462us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= nhtc_OtherForeignCountriesMember
347us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= nhtc_OtherForeignCountriesMember
Russia and Kazakhstan and Ukraine [Member]    
Net sales from external customers:    
Net sales from external customers $ 3,113us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= nhtc_RussiaAndKazakhstanAndUkraineMember
$ 4,354us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementGeographicalAxis
= nhtc_RussiaAndKazakhstanAndUkraineMember