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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2016
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 computation of basic and diluted earnings per share |
|  | Years ended December 31,
|  | 2016 |  | 2015 |
Numerator |  |  |  |  |  |  |
Net income |  | $ | 36,225,831 |  |  | $ | 34,068,037 |  |
Denominator |  |  |  |  |  |  |  |  |
Basic: Weighted-average common shares outstanding during the year |  |  | 46,279,033 |  |  |  | 45,167,288 |  |
Add: Dilutive effect of stock options |  |  | 346,630 |  |  |  | 942,116 |  |
Diluted |  |  | 46,625,663 |  |  |  | 46,109,404 |  |
Earnings per share |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.78 |  |  | $ | 0.75 |  |
Diluted |  | $ | 0.78 |  |  | $ | 0.74 |  |

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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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