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Notes Receivable - Schedule of Notes Receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Note Amount, current | $ 1,500 |
Plus Accrued interest, current | 250 |
Less Unamortized Note Discount, current |  |
Note Balance per Balance Sheet, current | 1,750 |
Note Amount, non-current | 4,332 |
Plus Accrued interest, non-current | 1 |
Less Unamortized Note Discount, non-current | (1,005) |
Note Balance per Balance Sheet, non-current | 3,328 |
Note Amount, current and non-current | 5,832 |
Plus Accrued interest, current and non-current | 251 |
Less Unamortized Note Discount, current and non-current | (1,005) |
Note Balance per Balance Sheet, current and non-current | 5,078 |
Notes Receivable Laramide [Member] |  |
Note Amount, current | 1,500 |
Plus Accrued interest, current | 250 |
Less Unamortized Note Discount, current |  |
Note Balance per Balance Sheet, current | 1,750 |
Note Amount, non-current | 3,500 |
Plus Accrued interest, non-current |  |
Less Unamortized Note Discount, non-current | (1,005) |
Note Balance per Balance Sheet, non-current | 2,495 |
NotesReceivable - Alabama Graphite [Member] |  |
Note Amount, non-current | 832 |
Plus Accrued interest, non-current | 1 |
Less Unamortized Note Discount, non-current |  |
Note Balance per Balance Sheet, non-current | $ 833 |

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- Definition Notes, loans and financing receivable, net, current and noncurrent. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + 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 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer. + 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 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount as of the balance sheet date of noncurrent interest earned but not received. Also called accrued interest or accrued interest receivable. + 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(17)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) within one year of the balance sheet date or the normal operating cycle, whichever is longer. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4531-111522 Reference 2: 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(a),(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c),(e) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 + Details
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