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13. Business Segments (Details 1) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenues: | $ 12,042,702 | $ 13,118,090 | $ 9,073,324
Gross profit: | (318,687) | 891,531 | 429,365
Depreciation and amortization: | 472,990 | 405,746 | 328,489
Antimony [Member] |  |  |
Revenues: | 9,401,003 | 11,074,449 | 6,657,369
Gross profit: | 672,939 | 1,556,013 | 903,560
Depreciation and amortization: | 263,214 | 199,515 | 141,421
Zeolite [Member] |  |  |
Revenues: | 2,641,699 | 2,043,641 | 2,415,955
Gross profit: | 361,961 | 118,185 | 470,172
Depreciation and amortization: | $ 209,776 | $ 206,231 | $ 187,068

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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