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1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 6 Months Ended
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Jun. 30, 2015
Accounting Policies [Abstract] |
Schedule of property plant and equipment useful life |
|  | Useful life (in years)
Buildings (including salt pans) |  | 8 - 20
Plant and machinery (including protective shells, transmission channels and ducts) |  | 3 - 8
Motor vehicles |  | 5
Furniture, fixtures and equipment |  | 3-8
Schedule of earnings per share |
|  | Three-Month Period Ended June 30, |  |  | Six-Month Period Ended June 30,
|  | 2015 |  |  | 2014 |  |  |  | 2015 |  |  |  | 2014 |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 10,775,260 |  |  | $ | 5,664,812 |  |  | $ | 16,090,531 |  |  | $ | 9,951,150 |  |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic: Weighted-average common shares outstanding during the period |  |  | 45,928,234 |  |  |  | 38,726,415 |  |  |  | 44,313,537 |  |  |  | 38,662,773 |  |
Add: Dilutive effect of stock options |  |  | 1,214,839 |  |  |  | 614,813 |  |  |  | 1,005,671 |  |  |  | 647,173 |  |
Diluted |  |  | 47,143,073 |  |  |  | 39,341,228 |  |  |  | 45,319,208 |  |  |  | 39,309,946 |  |
Net income per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.23 |  |  | $ | 0.15 |  |  | $ | 0.36 |  |  | $ | 0.26 |  |
Diluted |  | $ | 0.23 |  |  | $ | 0.14 |  |  | $ | 0.36 |  |  | $ | 0.25 |  |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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