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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Accounts receivable aging

Accounts Receivable Aging	Percent Collected
90-120 days	49%
121-150 days	42%
151-180 days	52%
181-210 days	100%
211-240 days	100%

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,
		2017 Restated				2016
Numerator
Net income		$	7,953,313			$	36,225,831
Denominator
Basic: Weighted-average common shares  outstanding during the year			46,796,476				46,279,033
Add: Dilutive effect of stock options			39,354				346,630
Diluted			46,835,830				46,625,663
Earnings per share
Basic		$	0.17			$	0.78
Diluted		$	0.17			$	0.78

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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
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-Subparagraph (SX 210.5-02.3,4)
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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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
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