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STOCKHOLDERS' EQUITY - STOCK-BASED COMPENSATION TO SERVICE PROVIDERS (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Stock-Based Compensation to Service Providers |  |  |
Stock-based compensation for services by non-employees | $ 200,000 | $ 156,000 | $ 364,000
Common Stock |  |  |
Stock-Based Compensation to Service Providers |  |  |
Shares issued (in shares) | 72,066 | 21,541 | 18,077
Consultants | Stock Options |  |  |
Stock-Based Compensation to Service Providers |  |  |
Stock-based compensation for services by non-employees | $ 41,000 | $ 104,000 | $ 311,000
Directors and Consultants | Common Stock |  |  |
Stock-Based Compensation to Service Providers |  |  |
Stock-based compensation for services by non-employees | $ 159,000 | $ 52,000 | $ 53,000
Shares issued (in shares) | 72,066 | 21,541 | 18,077

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- Definition Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims. + 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=98514028&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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