Annual report pursuant to Section 13 and 15(d)

Property, plant and equipment, net (Details Textual)

v3.7.0.1
Property, plant and equipment, net (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Depreciation $ 4,797,968 $ 4,794,162
Property, Plant and Equipment, Transfers and Changes 229,951 2,547,545
Pledged Assets Not Separately Reported Property Plant And Equipment 11,854,452  
Impairment of Long-Lived Assets to be Disposed of 530,914 0
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Debt Instrument, Collateral Amount 394,640  
Huizhou Facilities [Member]    
Property, Plant and Equipment [Line Items]    
Pledged Assets Not Separately Reported Property Plant And Equipment 8,864,837 9,715,879
Ganzhou Facilities [Member]    
Property, Plant and Equipment [Line Items]    
Pledged Assets Not Separately Reported Property Plant And Equipment $ 2,594,975 $ 2,703,743