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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 9 Months Ended
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Sep. 30, 2013
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) |  |  | 5 - 8 |
Motor vehicles |  |  | 5 |
Furniture, fixtures and equipment |  |  | 8 |
Schedule of computation of basic and diluted earnings per share |
|  | Three-Month Period Ended September 30, |  |  | Nine-Month Period Ended September 30,
|  | 2013 |  |  | 2012 |  |  |  | 2013 |  |  |  | 2012 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 8,109,729 |  |  | $ | 4,113,216 |  |  | $ | 15,348,593 |  |  | $ | 13,088,997 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic: Weighted-average common shares outstanding during the period |  |  | 38,368,267 |  |  |  | 34,560,743 |  |  |  | 38,368,267 |  |  |  | 34,560,743 |
Add: Dilutive effect of stock options |  |  | 594,887 |  |  |  | 139,246 |  |  |  | 317,343 |  |  |  | 396,476 |
Diluted |  |  | 38,963,154 |  |  |  | 34,699,989 |  |  |  | 38,685,610 |  |  |  | 34,957,219 |
Net income per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.21 |  |  | $ | 0.12 |  |  | $ | 0.40 |  |  | $ | 0.38 |
Diluted |  | $ | 0.21 |  |  | $ | 0.12 |  |  | $ | 0.40 |  |  | $ | 0.37 |

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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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