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14. 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 | 9,012,140 | 11,810,207
Income from operations after income taxes | 2,159,471 | 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 |  | 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 | 5,402,000 | 0
Income from operations after income taxes | (7,975,722) | 1,020,518
Total assets | 65,509 | 89,283
Depreciation and amortization | 0 | 0
Capital expenditures | 0 | 0
Goodwill | $ 0 | $ 0

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