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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