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STOCKHOLDERS' EQUITY - STOCK-BASED COMPENSATION TO SERVICE PROVIDERS (Details) - USD ($)	12 Months Ended
	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

X

- 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

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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