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8. Long-Term Debt (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Total debt | $ 1,733,190 | $ 1,786,114
Less current portion | (705,460) | (546,988)
Noncurrent portion | 1,027,730 | 1,239,126
Zeo Inc. [Member] |  |
Total debt | 100,000 | 0
First Security Bank [Member] |  |
Total debt | 0 | 8,054
Catepillar Finance [Member] |  |
Total debt | 14,022 | 27,096
Catepillar Finance [Member] |  |
Total debt | 34,390 | 40,278
De Lage Landen Financial Services [Member] |  |
Total debt | 5,851 | 13,344
De Lage Landen Financial Services [Member] |  |
Total debt | 8,371 | 15,776
PhyllisRice [Member] |  |
Total debt | 12,146 | 14,146
SoyatalMine [Member] |  |
Total debt | 639,747 | 715,709
Guadalupe Mine [Member] |  |
Total debt | $ 918,663 | $ 951,711

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