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Trade Accounts and Bills Receivable, net (Tables) | 3 Months Ended
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Mar. 31, 2018
SCHEDULE OF TRADE ACCOUNTS RECEIVABLE [Table Text Block] |
|  |  | December 31, |  |  | March 31, |
|  |  | 2017 |  |  | 2018 |
| Trade accounts receivable | $ | 42,095,211 |  | $ | 36,767,530 |
| Less: Allowance for doubtful accounts |  | (3,700,922 | ) |  | (3,749,172 | )
|  |  | 38,394,289 |  |  | 33,018,358 |
| Bills receivable |  | 19,124,323 |  |  | 11,294,221 |
|  | $ | 57,518,612 |  | $ | 44,312,579 |
SCHEDULE OF ANALYSIS OF THE ALLOWANCE FOR DOUBTFUL ACCOUNTS [Table Text Block] |
|  |  | March 31, |  |  | March 31, |
|  |  | 2017 |  |  | 2018 |
| Balance at beginning of period | $ | 2,761,144 |  | $ | 3,700,922 |
| Provision for the period |  | 38,706 |  |  | 11,199 |
| Reversal – recoveries by cash |  | (29,601 | ) |  | (97,852 | )
| Charged to consolidated statements of operations and comprehensive (loss) income |  | 9,105 |  |  | (86,653 | )
| Foreign exchange adjustment |  | 22,446 |  |  | 134,903 |
| Balance at end of period | $ | 2,792,695 |  | $ | 3,749,172 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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