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9. Debt (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Total debt	$ 1,680,098	$ 1,733,190
Less current portion	(761,663)	(705,460)
Noncurrent portion	918,435	1,027,730
Zeo
Total debt	100,000	100,000
Cat Financial Services
Total debt	5,321	14,022
Cat Financial Services
Total debt	30,071	34,390
De Lage Landen Financial Services
Total debt	2,005	5,851
De Lage Landen Financial Services 1
Total debt	4,569	8,371
Phyllis Rice
Total debt	6,146	12,146
Soyatal Mine
Total debt	618,078	639,747
Guadalupe Mine
Total debt	$ 913,908	$ 918,663

X

- Definition

Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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- Definition

Carrying value as of the balance sheet date of the portion of long-term debt due within one year or the operating cycle if longer identified as Convertible Notes Payable. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

+ References

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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