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15. BUSINESS SEGMENTS (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Information [Line Items]    
Net revenue (external customers) $ 34,495,450 $ 34,910,829
Net revenue (intersegment) 1,822,202 1,505,677
Income (loss) from operations before taxes 8,666,318 7,110,651
Income taxes 2,267,671 1,871,488
Income (loss) from operations after taxes 6,398,647 5,239,163
Total assets 367,144,692 354,324,931
Depreciation and amortization 6,869,721 7,378,988
Goodwill 29,706,970 31,452,271
Bromine Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 13,169,528 11,033,249
Net revenue (intersegment) 1,822,202 1,505,677
Income (loss) from operations before taxes 3,005,518 136,959
Income taxes 743,370 75,406
Income (loss) from operations after taxes 2,262,148 61,553
Total assets 150,811,432 140,192,979
Depreciation and amortization 4,367,792 4,735,301
Goodwill 0 0
Crude Salt Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 1,766,608 1,963,731
Net revenue (intersegment) 0 0
Income (loss) from operations before taxes 227,613 187,535
Income taxes 63,504 9,057
Income (loss) from operations after taxes 164,109 178,478
Total assets 30,335,316 37,708,081
Depreciation and amortization 1,192,666 1,401,296
Goodwill 0 0
Chemical Products Segment [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 19,559,314 21,913,849
Net revenue (intersegment) 0 0
Income (loss) from operations before taxes 5,723,731 7,046,740
Income taxes 1,460,797 1,787,025
Income (loss) from operations after taxes 4,262,934 5,259,715
Total assets 185,961,792 176,388,517
Depreciation and amortization 1,309,263 1,242,391
Goodwill 29,706,970 31,452,271
Segment Total [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 34,495,450 34,910,829
Net revenue (intersegment) 1,822,202 1,505,677
Income (loss) from operations before taxes 8,956,862 7,371,234
Income taxes 2,267,671 1,871,488
Income (loss) from operations after taxes 6,689,191 5,499,746
Total assets 367,108,540 354,289,577
Depreciation and amortization 6,869,721 7,378,988
Goodwill 29,706,970 31,452,271
Corporate [Member]    
Segment Reporting Information [Line Items]    
Net revenue (external customers) 0 0
Net revenue (intersegment) 0 0
Income (loss) from operations before taxes (290,544) (260,583)
Income taxes 0 0
Income (loss) from operations after taxes (290,544) (260,583)
Total assets 36,152 35,354
Depreciation and amortization 0 0
Goodwill $ 0 $ 0