Quarterly report pursuant to Section 13 or 15(d)

Segment information (Details 2)

v3.7.0.1
Segment information (Details 2) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 51,699,930 $ 36,732,310 $ 93,566,778 $ 65,829,365
China Mainland [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 32,086,138 28,855,932 54,247,730 37,385,011
Asia, others [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 12,092,612 6,295,056 25,788,170 18,275,423
Europe [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 3,612,677 208,548 8,465,407 6,524,327
North America [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 3,604,935 1,285,688 4,663,067 2,919,834
South America [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 205,549 14,074 267,286 478,971
Africa [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales 55,567 25,968 55,567 50,001
Others [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net sales $ 42,452 $ 47,044 $ 79,551 $ 195,798