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16. Business Segments (Details 2) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Revenues | $ 10,229,978 | $ 11,890,135
Depreciation and amortization | 968,888 | 999,737
Income (loss) from operations | (959,699) | (816,522)
Income tax expense | 0 | (298,138)
Other income (expense) | (174,695) | (194,540)
NET INCOME (LOSS) | (1,134,394) | (1,309,200)
USA Antimony [Member] |  |
Revenues | 7,588,470 | 8,740,602
Depreciation and amortization | 57,761 | 62,863
Income (loss) from operations | 1,965,573 | 3,393,787
Income tax expense | 0 | (13,090)
Other income (expense) | (35,853) | (34,262)
NET INCOME (LOSS) | 1,929,720 | 3,346,435
Mexico Antimony [Member] |  |
Revenues | 0 | 3,568
Depreciation and amortization | 623,899 | 678,639
Income (loss) from operations | (3,579,810) | (5,083,832)
Income tax expense | 0 | (285,048)
Other income (expense) | (126,149) | (149,165)
NET INCOME (LOSS) | (3,705,959) | (5,518,045)
Antimony [Member] |  |
Revenues | 7,588,470 | 8,744,170
Depreciation and amortization | 681,660 | 741,502
Income (loss) from operations | (1,614,237) | (1,690,045)
Income tax expense | 0 | (298,138)
Other income (expense) | (162,002) | (183,427)
NET INCOME (LOSS) | (1,776,239) | (2,171,610)
Precious Metals [Member] |  |
Revenues | 374,872 | 672,871
Depreciation and amortization | 64,499 | 44,367
Income (loss) from operations | 310,373 | 628,504
Income tax expense | 0 | 0
Other income (expense) | 0 | 0
NET INCOME (LOSS) | 310,373 | 628,504
Zeolite (Member) |  |
Revenues | 2,266,636 | 2,473,094
Depreciation and amortization | 222,729 | 213,868
Income (loss) from operations | 344,165 | 245,019
Income tax expense | 0 | 0
Other income (expense) | (12,693) | (11,113)
NET INCOME (LOSS) | $ 331,472 | $ 233,906

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