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

6 Months Ended

Jun. 30, 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 earnings per share

		Three-Month Period Ended June 30,								Six-Month Period Ended June 30,
		2016				2015					2016				2015
Numerator
Net income		$	13,197,019			$	10,775,260			$	19,663,983			$	16,090,531

Denominator
Basic: Weighted-average common shares outstanding during the period			46,008,102				45,928,234				46,007,611				44,313,537
Add: Dilutive effect of stock options			622,989				1,214,839				678,098				1,005,671
Diluted			46,631,091				47,143,073				46,685,709				45,319,208

Earnings per share
Basic		$	0.29			$	0.23			$	0.43			$	0.36
Diluted		$	0.28			$	0.23			$	0.42			$	0.36