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15. BUSINESS SEGMENTS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]    
Net revenue (external customers) $ 149,275,002 $ 162,317,120
Net revenue (intersegment) 8,484,617 8,039,156
Income from operations before taxes 47,723,342 45,164,710
Income taxes 11,810,207 11,371,908
Income from operations after taxes 35,913,135 33,792,802
Total assets 365,691,353 356,743,226
Depreciation and amortization 24,880,246 29,095,648
Capital expenditures 16,995,862 22,858,625
Goodwill 27,668,539 29,559,174
Bromine Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 56,811,730 52,385,491
Net revenue (intersegment) 8,484,617 8,039,156
Income from operations before taxes 21,224,862 10,854,711
Income taxes 5,306,216 2,508,902
Income from operations after taxes 15,918,646 8,345,809
Total assets 143,145,960 136,701,878
Depreciation and amortization 15,056,980 17,498,441
Capital expenditures 12,912,583 20,665,890
Goodwill 0 0
Crude Salt Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 8,985,852 10,494,939
Net revenue (intersegment) 0 0
Income from operations before taxes 9,076 1,183,755
Income taxes 9,022 500,451
Income from operations after taxes 54 683,304
Total assets 33,980,033 40,306,628
Depreciation and amortization 5,221,667 6,136,889
Capital expenditures 2,335,963 2,120,622
Goodwill 0 0
Chemical Products Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 83,477,420 99,436,690
Net revenue (intersegment) 0 0
Income from operations before taxes 25,473,792 32,997,870
Income taxes 6,494,969 8,362,555
Income from operations after taxes 18,978,823 24,635,315
Total assets 186,676,983 179,733,958
Depreciation and amortization 4,601,599 5,460,318
Capital expenditures 0 72,113
Goodwill 27,668,539 29,559,174
Natural Gas [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 0 0
Net revenue (intersegment) 0 0
Income from operations before taxes (4,906) 0
Income taxes 0 0
Income from operations after taxes (4,906) 0
Total assets 1,799,094 0
Depreciation and amortization 0 0
Capital expenditures 1,747,316 0
Goodwill 0 0
Segment Total [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 149,275,002 162,317,120
Net revenue (intersegment) 8,484,617 8,039,156
Income from operations before taxes 46,702,824 45,036,336
Income taxes 11,810,207 11,371,908
Income from operations after taxes 34,892,617 33,664,428
Total assets 365,602,070 356,742,464
Depreciation and amortization 24,880,246 29,095,648
Capital expenditures 16,995,862 22,858,625
Goodwill 27,668,539 29,559,174
Corporate [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 0 0
Net revenue (intersegment) 0 0
Income from operations before taxes 1,020,518 128,374
Income taxes 0 0
Income from operations after taxes 1,020,518 128,374
Total assets 89,283 762
Depreciation and amortization 0 0
Capital expenditures 0 0
Goodwill $ 0 $ 0