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RECEIVABLES (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2014 USD ($) note
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Note Receivables | note |  |  | 2
Accounts receivable, net, current | $ 2,617,000 | $ 364,000 |
Accounts receivable, net, noncurrent | $ 1,096,000 | 1,146,000 |
Financing receivable, principal amount |  |  | $ 1,050,000.00
Annual interest rate | 3.00% |  |
Financing receivable, reserve against collectability | $ 220,000 | 220,000 |
Trade receivables - mineral concentrate sales |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable, net, current | 1,868,000 | 0 |
Trade receivables - other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable, net, current | 749,000 | 364,000 |
Notes receivable and other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable, net, noncurrent | $ 1,096,000 | $ 1,146,000 |

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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