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Inventories
12 Months Ended
Dec. 31, 2017
Inventories [Text Block]
6. Inventories

Inventories as of September 30, 2016, December 31, 2016 and 2017 consisted of the following:

 

  September 30,     December 31,     December 31,  

 

  2016     2016     2017  

Raw materials

$ 3,760,481   $ 2,570,942   $ 1,814,704  

Work in progress

  2,153,945     1,333,949     2,188,193  

Finished goods

  10,625,826     13,190,031     5,829,508  

 

$ 16,540,252   $ 17,094,922   $ 9,832,405  

During the year ended September 30, 2016, three months ended December 31, 2016 and year ended December 31, 2017, write-downs of obsolete inventories to lower of cost or net realizable value of $439,068, $414,919 and $5,776,891, respectively, were charged to cost of revenues.