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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Property, Plant and Equipment, Depreciation, Estimated Lives | Property, plant and equipment are recorded at cost less accumulated depreciation. Depreciation is recognized on a straight-line basis over the following estimated useful lives:
Buildings and plants |  | 30 years
Machinery and equipment |  | 15 years
Furniture, fixtures and equipment |  | 3-5 years
Motor vehicles |  | 6 years
Schedule of Share-Based Compensation Expenses |
|  | Year ended December 31, |
|  | 2016 |  |  | 2017 |  |  | 2018 |
Selling, general and administrative expenses |  | $ | 2,501,957 |  |  | $ | 3,679,145 |  |  | $ | 12,461,838 |
Cost of revenues |  |  | 200,132 |  |  |  | 521,128 |  |  |  | 1,326,211 |
Total |  | $ | 2,702,089 |  |  | $ | 4,200,273 |  |  | $ | 13,788,049 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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