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15. BUSINESS SEGMENTS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]    
Net revenue (external customers) $ 107,522,441 $ 149,275,002
Net revenue (intersegment) 6,305,642 8,484,617
Income from operations before income taxes 11,171,611 47,723,342
Income taxes 3,610,140 11,810,207
Income from operations after income taxes 7,561,471 35,913,135
Total assets 387,499,423 365,691,353
Depreciation and amortization 20,197,313 24,880,246
Capital expenditures 17,938,652 16,995,862
Goodwill 29,374,909 27,668,539
Bromine Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 42,224,901 56,811,730
Net revenue (intersegment) 6,305,642 8,484,617
Income from operations before income taxes 12,460,230 21,224,862
Income taxes 3,156,016 5,306,216
Income from operations after income taxes 9,304,214 15,918,646
Total assets 147,124,127 143,145,960
Depreciation and amortization 14,533,169 15,056,980
Capital expenditures 465,655 12,912,583
Goodwill 0 0
Crude Salt Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 8,986,080 8,985,852
Net revenue (intersegment) 0 0
Income from operations before income taxes 2,426,137 9,076
Income taxes 585,521 9,022
Income from operations after income taxes 1,840,616 54
Total assets 51,512,530 33,980,033
Depreciation and amortization 2,452,737 5,221,667
Capital expenditures 17,411,762 2,335,963
Goodwill 0 0
Chemical Products Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 56,311,460 83,477,420
Net revenue (intersegment) 0 0
Income from operations before income taxes (1,024,569) 25,473,792
Income taxes (131,397) 6,494,969
Income from operations after income taxes (893,172) 18,978,823
Total assets 186,677,501 186,676,983
Depreciation and amortization 3,211,407 4,601,599
Capital expenditures 0 0
Goodwill 29,374,909 27,668,539
Natural Gas [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 0 0
Net revenue (intersegment) 0 0
Income from operations before income taxes (116,465) (4,906)
Income taxes 0 0
Income from operations after income taxes (116,465) (4,906)
Total assets 2,119,756 1,799,094
Depreciation and amortization 0 0
Capital expenditures 61,235 1,747,316
Goodwill 0 0
Segment Total [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 107,522,441 149,275,002
Net revenue (intersegment) 6,305,642 8,484,617
Income from operations before income taxes 13,745,333 46,702,824
Income taxes 3,610,140 11,810,207
Income from operations after income taxes 10,135,193 34,892,617
Total assets 387,433,914 365,602,070
Depreciation and amortization 20,197,313 24,880,246
Capital expenditures 17,938,652 16,995,862
Goodwill 29,374,909 27,668,539
Corporate [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 0 0
Net revenue (intersegment) 0 0
Income from operations before income taxes (2,573,722) 1,020,518
Income taxes 0 0
Income from operations after income taxes (2,573,722) 1,020,518
Total assets 65,509 89,283
Depreciation and amortization 0 0
Capital expenditures 0 0
Goodwill $ 0 $ 0