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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

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