Annual report pursuant to Section 13 and 15(d)

Long-term loans (Details Textual)

v3.7.0.1
Long-term loans (Details Textual) - Bank Of China [Member]
¥ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jan. 13, 2012
USD ($)
Jan. 13, 2012
CNY (¥)
Debt Instrument [Line Items]        
Debt Instrument, Face Amount     $ 8,000,000 ¥ 50
Debt Instrument, Interest Rate, Stated Percentage 5.23%      
Debt Instrument Basis Multiple 110.00%      
Interest Expense, Long-term Debt, Total $ 43,197 $ 219,704