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Inventories | 9 Months Ended
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Sep. 30, 2018
Inventories [Text Block] |
4. | Inventories
Inventories as of December 31, 2017 and September 30, 2018 consisted of the following:
|  | December 31, |  |  | September 30, |
|  | 2017 |  |  | 2018 |
Raw materials | $ | 1,814,704 |  | $ | 1,686,481 |
Work in progress |  | 2,188,193 |  |  | 3,196,511 |
Finished goods |  | 5,829,508 |  |  | 4,241,591 |
| $ | 9,832,405 |  | $ | 9,124,583 |
During the three months ended September 30, 2017 and 2018, write-downs of inventories to lower of cost or net realizable value of $360,778 and $729,247, respectively, were charged to cost of revenues. During the nine months ended September 30, 2017 and 2018, write-downs of inventories to lower of cost or net realizable value of $1,359,182 and $730,446, respectively, were charged to cost of revenues.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration